Organic, Hybrid, and Perovskite Photovoltaics XIX最新文献

{"title":"Multi-junction polymer solar cells: Status and challenges (Conference Presentation)","authors":"R. Janssen","doi":"10.1117/12.2321322","DOIUrl":"https://doi.org/10.1117/12.2321322","url":null,"abstract":"Multi-junction device architectures represent a promising strategy to further advance the efficiency of organic solar cells. For solution-processed organic solar cells, tandem and triple junction cells have been reported in the past. Yet, several challenges remain, both in developing new photoactive materials as well crating new recombination layers that serve to interconnect the subcells. We developed new versatile charge recombination layers for solution-processed multi-junction solar cells in n-i-p and p-i-n architectures. The new recombination layers provide an essentially lossless contact in each case, without the need of adjusting the formulations or deposition conditions for six different tandem cells and three different triple-junction solar cells, employing a range of different photoactive layers. The approach permitted realizing complex devices in good yields, providing a power conversion efficiency up to 10%. We will also present a first example of a quadruple-junction polymer solar cell, featuring four different and complementary band gap absorber layers that absorb light up to 1150 nm. The quadruple junction cell is reaches a power conversion efficiency of about 7.5% with an open-circuit voltage of 2.46 V. Measuring the external quantum efficiency (EQE) of the quadruple cells has been accomplished using a protocol using bias light of different wavelengths, involving optical modeling and correcting for the build-up electric field. At present, the efficiency of the quadruple-junction polymer cell is mainly limited by bimolecular recombination in the active layers.","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134361247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular understanding of organic-organic interfaces and mixtures (Conference Presentation)","authors":"D. Andrienko","doi":"10.1117/12.2322112","DOIUrl":"https://doi.org/10.1117/12.2322112","url":null,"abstract":"","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125222110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nano-FTIR investigation using synchrotron radiation on organic-inorganic hybrid perovskite films (Conference Presentation)","authors":"A. Nogueira, R. Szostak, H. Tolentino, J. C. Silva, R. Freitas, M. M. Soares","doi":"10.1117/12.2321156","DOIUrl":"https://doi.org/10.1117/12.2321156","url":null,"abstract":"","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121908601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, processing, and microstructural tailoring of Pb-based and Pb-free halide perovskite thin films for large-area, efficient, and stable solar cells G211 (Conference Presentation)","authors":"N. Padture","doi":"10.1117/12.2320095","DOIUrl":"https://doi.org/10.1117/12.2320095","url":null,"abstract":"Solution-processed thin-film perovskite solar cells (PSCs), where the record efficiency has rocketed from 3.8% to 22.7% - comparable to commercial silicon-based solar cells - in just eight years, offer unprecedented promise of low-cost, high-efficiency renewable electricity generation. Organic-inorganic halide perovskites (OIHPs) at the heart of PSCs have unique structures, which entail rotating organic cations inside inorganic cages, imparting them with desirable optical and electronic properties. To exploit these properties for PSCs application, the reliable deposition of high-quality OIHP thin films over large areas is critically important. The microstructures and grain-boundary networks in the resulting polycrystalline OIHP thin films are equally important as they control the PSC performance and stability. Fundamental phenomena pertaining to synthesis, crystallization, coarsening, and microstructural evolution involved in the processing of OIHP thin films for PSCs will be discussed with specific examples. Additionally, the discovery of Pb-free, Ti-based all-inorganic halide perovskites will be presented, together with the demonstration of viable PSCs based on these new halide perovskites. The overall goal of our research is to have deterministic control over scalable processing of tailored halide perovskite thin films with desired compositions, microstructures, and grain-boundary networks for large-area, high-efficiency, and stable PSCs.","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132378721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantifying loss-mechanisms related to charge carrier collection in thin-film solar cells (Conference Presentation)","authors":"Oskar J. Sandberg, Mathias Nyman, Staffan Dahlström, S. Sandén, J. Smått, R. Österbacka","doi":"10.1117/12.2323759","DOIUrl":"https://doi.org/10.1117/12.2323759","url":null,"abstract":"Processes taking place at contacts are of particular importance in organic and perovskite solar cells where selective contacts that are able to efficiently collect majority carriers, simultaneously blocking minority carriers are desired. The surface recombination velocity S_R, describing the quality of the contact interface, is a key parameter in obtaining an increased understanding of the kinetics taking place at contacts in thin-film devices [1]. \u0000We have extended the analytical framework of the charge extraction by linearly increasing voltage (CELIV) theory taking the effect of built-in voltage, diffusion and band-bending into account [2] and show how we can experimentally quantify loss mechanisms in charge collection [3-4]. We have derived analytical expressions describing the effective reduction of the built-in voltage and the (effective) open-circuit voltage providing means to quantify and distinguish various (loss) mechanisms for contact related effects in thin film solar cells [2-4]. \u0000\u0000References \u0000[1] O. Sandberg, M. Nyman, R. Osterbacka, Physical Review Applied 1, 024003 (2014)\u0000[2] O. Sandberg, M. Nyman, R. Osterbacka, Organic Electronics 15, 3413-3420 (2015)\u0000[3] A. Sundqvist, M. Nyman, O. Sandberg, S. Sanden, J.-H. Smatt, and R. Osterbacka, Advanced Energy Materials, 1502265 (2016)\u0000[4] O.J. Sandberg, et. al, Physical Review Letters, 118, 076601 (2017).","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127948637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of charge transport in methylammonium lead halide thin films via solvent vapor annealing (Conference Presentation)","authors":"Andrew M. Zeidell, Colin Tyznik, L. Jennings, Chuang Zhang, Hyunsu Lee, M. Guthold, Z. Vardeny, O. Jurchescu","doi":"10.1117/12.2320276","DOIUrl":"https://doi.org/10.1117/12.2320276","url":null,"abstract":"In hybrid halide perovskite, the effectiveness of charge transport in relation to film microstructure and processing has remained elusive. In this study we succeeded in tuning grain size and grain boundary chemistry through solvent vapor annealing, which resulted in an increase in charge-carrier mobility by one order of magnitude. To understand the mechanism responsible for the enhanced charge transport, we performed a series of complementary measurements. Atomic force microscopy revealed an increase in grain size and uniformity, and optical microscopy showed a macroscopic reorganization of the film structure. X-ray diffraction measurements of the MAPbI3-xClx films confirmed the removal of preferential orientation after 20 min of solvent annealing at room temperature, in N,N-dimethylformamide. The presence of additional peaks was assigned to the formation of the solvent complex MAI:DMF:PbI2 and the PbI2:DMF ligand, and the content of these phases was monitored as a function of annealing time. Charge-carrier mobility was evaluated from field-effect transistor measurements in devices with gold top contacts and SiO2 bottom-gate dielectric. We obtained ambipolar transport, with both hole and electron mobility exceeding 10cm2/Vs at room temperature. We propose that this remarkable enhancement in electrical properties resulted from an increase in the grain size and passivation of grain boundaries via formation of intermediate solvent complexes formed from unreacted material. This work has allowed us to gain unprecedented insight into the impact of film morphology on charge transport in perovskite materials, an important milestone towards achieving high-performance optoelectronic devices such as transistors, photovoltaics, light emitting diodes, and photodetectors.","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121012001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photoinduced absorption of aggregate-coupled intermolecular charge transfer states and their impact on small molecule photovoltaic device efficiency (Conference Presentation)","authors":"C. Collison, Chenyu Zheng, D. McCamant, Michael F. Mark","doi":"10.1117/12.2321344","DOIUrl":"https://doi.org/10.1117/12.2321344","url":null,"abstract":"Squaraines continue to attract attention for their use in non-linear optics, fluorescence bioimaging and organic photovoltaics applications because of their strong, broad NIR absorbance and optoelectronic properties that depend on both excitonic and intermolecular charge transfer (ICT) couplings in the solid state. Our previous theoretical work demonstrates splitting of the H-aggregate with coupling to the ICT that goes beyond Kasha’s exciton model. This ICT splitting leads to the panchromatic absorption profile in the solid state, but the impact of the ICT on excited state diffusion and dynamics remains unclear.\u0000Here, we employ subpicosecond transient absorption spectroscopy to probe the excited state photophysics of an anilino-squaraine and its aggregates. Our samples are designed with a continuum of intermolecular separation from monomers in solution, through solid solution thin films, to the fully condensed phase, demonstrating the increasing contribution of short-range intermolecular charge transfer. We measure excited state kinetics that confirm species assignments and we show the effect of ICT states on exciton diffusion. The experimental results are in excellent agreement with our theoretical modeling.\u0000Finally, we correlate this combination of theory and excited state characterization with the measured efficiency in small molecule organic photovoltaic devices. Our remarkable results explain the importance of excitonic and ICT couplings for future applications driven by rational optoelectronic material design.","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134383840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-assembled quasi-3D nanocomposite as novel p-type hole transport layer for highly performed inverted organic solar cells (Conference Presentation)","authors":"W. Choy","doi":"10.1117/12.2320852","DOIUrl":"https://doi.org/10.1117/12.2320852","url":null,"abstract":"Hole transport layer (HTL) plays a critical role for achieving high performance solution-processed optoelectronics including organic electronics. For organic solar cells (OSCs), the inverted structure has been widely adopted to achieve prolonged stability. However, there are limited studies of p-type inorganic semiconductor-based effective HTL on top of organic active layer (hereafter named as top HTL) for inverted OSCs. Currently, the p-type top HTLs are mainly two-dimensional (2D) materials, which have vertical conduction limitation intrinsically and is too thin to function as practical HTL for large area optoelectronic applications. Here, we demonstrate a novel self-assembled quasi three-dimensional (3D) nanocomposite as a p-type top HTL [1]. Remarkably, the novel HTL achieves ~15 times enhanced conductivity and ~16 times extended thickness compared to the 2D counterpart. By applying this novel HTL in inverted OSCs covering fullerene and non-fullerene systems, device performance is significantly improved. The champion power conversion efficiency (PCE) reaches 12.13%, which is the highest reported performance of solution processed HTL based inverted OSCs. Furthermore, the stability of OSCs is dramatically enhanced compared with conventional devices. The work contributes to not only evolving the highly stable and large scale OSCs for practical applications but also diversifying the strategies to improve device performance.\u0000[1] J. Cheng, H. Zhang, Y. Zhao, J. Mao, C. Li, S. Zhang, K.S. Wong, J. Hou, W.C. H. Choy, \"Self-assembled Quasi-3D Nanocomposite: A Novel p-Type Hole Transport Layer for High Performance Inverted Organic Solar Cells\", Adv Funct. Mater., DOI:10.1002/adfm.201706403.","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116917211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pb free perovskite solar cells consisting of mixed metal SnGe perovskite as light absorber (Conference Presentation)","authors":"S. Hayase, Nozomi Ito, M. A. Kamarudin, Q. Shen, Y. Ogomi, S. Iikubo, K. Yoshino, T. Minemoto, T. Toyoda","doi":"10.1117/12.2321061","DOIUrl":"https://doi.org/10.1117/12.2321061","url":null,"abstract":"Despite the high-efficiency of these lead-based perovskite solar cells, the problem associated from the toxic nature of lead has open a new research direction which focuses on lead-free perovskite materials. As an alternative, tin has been proposed to replace lead. The highest efficiency obtained with Sn only perovskite was 9 % which was based on 2D and 3D mixture of FASnI3. However, Sn-based perovskites are known to have low stability in air. The use of germanium-based perovskite in solar cell was first realized by Krishnamoorthy et. al. The measured solar cell performance was notably low, 0.11 % for CsGeI3 and 0.20 % for MAGeI3. A theoretical study exploring hybrid tin and germanium perovskite showed that it is possible to prepare a stable Sn-Ge perovskite material that absorbs the sunlight spectrum. In this study, a new type of SnGe mixed metal perovskite solar cells are reported with enhanced efficiency and stability. In this report, FA0.75MA0.25Sn1-xGexI3 (abbreviated as SnGe(x)-PVK) were used for the mixed metal SnGe perovskite. XRD spectra showed that the structure is perovskite.\u0000The structure of Ge-doped Sn perovskite was also discussed from the view point of band gap, conduction and valence band level, XPS analysis, and the urbach energy. It can be concluded that most of the Ge atoms passivate the surface of the Sn perovskite (graded structure).For SnGe(0)-PVK device, the averageJsc was 17.61 mA/cm2, VOC was 0.46 V, FF was 0.41 and PCE of 3.31 %. Upon doping with 5 wt% of Ge, the JSC increased up to 19.80 mA/cm2, FF improved up to 0.55 with an overall efficiency of 4.48 %. Upon increasing the Ge content more than 10wt%, all the photovoltaic parameters decreased significantly which resulted in an efficiency as low as 0.80 % for SnGe(0.2)-PVK device. After optimization, 7.75% of SnGe(5)-PVK device is reported. Significant effect on Ge doping was seen in the enhancement of the stability. The stability in air has been improved significantly with the Ge doping, retaining 80 % of its original performance, remarkable stability enhancement, compared with 10 % retention for non-doped sample. This work provides a platform for further research on lead-free Sn-Ge based perovskite solar cells.","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124029284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient and stable tandem solar cells based on halide perovskites (Conference Presentation)","authors":"J. Y. Kim, I. Park, S. Ji, Min‐Ah Park, J. H. Park, Dong Seok Lee","doi":"10.1117/12.2322519","DOIUrl":"https://doi.org/10.1117/12.2322519","url":null,"abstract":"The tandem configuration consisting of two or more solar cells is practically the only approach to overcome the Shockley-Queisser limit, as evidenced by the III-V multijunction solar cells. From theoretical calculation, it has been found that the combination of a top cell with a large bandgap energy (e.g. 1.5~1.7 eV) and a bottom cell with a low bandgap energy (e.g. 1.0~1.1 eV) can lead to a conversion efficiency higher than 30%. Given that the bandgap energy of most commercial single junction solar cells is around 1.1 eV, the perovskite solar cells with a bandgap energy around 1.6 eV must be a very promising candidate for the top cell of tandem solar cells.\u0000In this presentation, I will discuss the essential requirements for preparing highly performing perovskite top cells of perovskite-based tandem solar cells. Firstly, the strategies for improving the performance of the p-i-n type planar perovskite solar cell, mostly focusing on the interfacial charge transfer, will be introduced. After a series of interfacial engineering procedures to the charge extraction layers, a conversion efficiency as high as 19% could be achieved. Secondly, strategies for fabricating transparent perovskite solar cells with a TCO top electrode layer will be discussed. Finally, some of the recent results on the highly efficient (> 23%) tandem solar cells incorporating the transparent perovskite top cell will be introduced.","PeriodicalId":122801,"journal":{"name":"Organic, Hybrid, and Perovskite Photovoltaics XIX","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134119360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}