Organic Photonics + Electronics最新文献_第10页

Record 1-micron thick QD film photodetectors using intercalated graphene electrodes for high responsivity in the infrared 使用嵌入石墨烯电极记录1微米厚的量子点薄膜光电探测器，在红外中具有高响应性

Organic Photonics + Electronics Pub Date : 2020-08-24 DOI: 10.1117/12.2569809

Wenjun Chen, Seungbae Ahn, C. Ingrosso, A. Panniello, M. Striccoli, G. Bianco, A. Agostiano, G. Bruno, M. Curri, O. Vázquez-Mena

{"title":"Record 1-micron thick QD film photodetectors using intercalated graphene electrodes for high responsivity in the infrared","authors":"Wenjun Chen, Seungbae Ahn, C. Ingrosso, A. Panniello, M. Striccoli, G. Bianco, A. Agostiano, G. Bruno, M. Curri, O. Vázquez-Mena","doi":"10.1117/12.2569809","DOIUrl":"https://doi.org/10.1117/12.2569809","url":null,"abstract":"Quantum dots (QDs) have extraordinary strong light absorption and size tunable bandgap. However, QD films are typically limited to ~200-300 nm due to their poor charge mobility. This severely limits the quantum efficiency of QD devices for λ <750 nm (infrared). Herein, we report a record 1 μm thick QD film using intercalated graphene layers as transparent current extractors. This overcomes QD poor mobility, ensuring both effective light absorption and charge extraction towards the near-infrared reaching quantum efficiency (EQE) of 90%. The short diffusion length (LD<200 nm) of QDs limits their useful thickness to ~200-300 nm1–4 , resulting in poor infrared light absorption. To overcome this limitation, we have built a 1 µm thick QD film with intercalated transparent graphene electrodes that keep high charge collection efficiency. As a result, the 1 µm intercalated devices show a superior EQE reaching 90% at λ ~800 nm without the drop of quantum efficiency at λ ~700 nm observed in most QD devices. The EQE of intercalated devices improves over the entire λ~ 600-1100 nm spectrum as the thickness increases from 100 nm to 1 μm, clearly breaking the restriction that the diffusion length of QDs imposes on the film thickness. This improves absorption and charge collection in the infrared.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128328243","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}

引用次数: 0

Low temperature aggregation transitions in N3 and Y6 acceptors enable double-annealing method that yields hierarchical morphology and superior efficiency in nonfullerene organic solar cells N3和Y6受体的低温聚集转变使双退火方法能够在非富勒烯有机太阳能电池中产生分层结构和优越的效率

Organic Photonics + Electronics Pub Date : 2020-08-24 DOI: 10.1117/12.2570507

Yunpeng Qin, Ye Xu, Zhengxing Peng, Jianhui Hou, H. Ade

引用次数: 2

Synchrotron and optical probing of mixed lead halide perovskites for photovoltaics 光电用混合卤化铅钙钛矿的同步加速器和光学探测

Organic Photonics + Electronics Pub Date : 2020-08-21 DOI: 10.1117/12.2569674

D. Hodges, Luis Valerio Frias, Á. De La Rosa, Alma Ileana Leyva, X. Tong

{"title":"Synchrotron and optical probing of mixed lead halide perovskites for photovoltaics","authors":"D. Hodges, Luis Valerio Frias, Á. De La Rosa, Alma Ileana Leyva, X. Tong","doi":"10.1117/12.2569674","DOIUrl":"https://doi.org/10.1117/12.2569674","url":null,"abstract":"The methylammonium lead iodide CH3NH3PbI3 (MAPbI3) perovskites have attracted a lot of attention as a possible absorber material for thin film solar cells due to their bandgap energy, high optical absorption coefficients and low-cost solution-processing deposition approaches. MAPbI3 perovskite solar cells have evolved with transformative potential with laboratory efficiencies greater than 20%. Perovskite absorber materials are very inexpensive to synthesize and simple to manufacture, making them an extremely commercially viable option. Perovskites of compositional variations ABX3 can yield a range of crystal structures, phases and stabilities. The Goldschmidt’s Tolerance Factor is a reliable figure of merit or empirical index to forecast the formation of preferred and stable structures and phases with ABX3 mixed halide perovskite tolerance factors in the range of 0.9 to 1. Here, we probe perovskites of compositional variations ABX3 with tolerance factors in the range of 0.9 to 1.0, and a large effective ionic radius greater than 200 pm. We report on the structural and optical properties of these perovskites. Photovoltaic (PV) devices were fabricated using these high tolerance factor perovskites. We report we have achieved power conversion efficiencies (PCEs) greater than 21% using the high tolerance factor perovskites investigated. The high tolerance perovskites were also characterized using synchrotron X-ray absorption near edge structure (XANES) spectroscopy at the National Synchrotron Light Source (NSLS) II at Brookhaven National Laboratory (BNL). XANES was used to probe the electronic structure of the high tolerance factor perovskites investigated.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125439957","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}

引用次数: 1

Control of molecular-level mechano-optical response of chiral liquid-crystalline elastomers 手性液晶弹性体的分子级机械光学响应控制

Organic Photonics + Electronics Pub Date : 2020-08-21 DOI: 10.1117/12.2569098

Kyosun Ku, Seiya Kimura, Kyoko Yuasa, K. Hisano, O. Tsutsumi

引用次数: 2

Laser engraving method to fabricate iodide and bromide based perovskite photosensors 激光雕刻法制备碘和溴基钙钛矿光传感器的方法

Organic Photonics + Electronics Pub Date : 2020-08-21 DOI: 10.1117/12.2568258

F. Khorramshahi, Navid Ghazizadeh, I. Kymissis, A. Takshi

引用次数: 3

A polymer composite based organic FET multi-sensing device 一种基于聚合物复合材料的有机场效应管多传感器件

Organic Photonics + Electronics Pub Date : 2020-08-21 DOI: 10.1117/12.2568269

Thomas H. Debesay, Sam S. Sun, M. Bahoura

引用次数: 1

Contact engineering in vertical hybrid field effect transistor 垂直混合场效应晶体管的接触工程

Organic Photonics + Electronics Pub Date : 2020-08-21 DOI: 10.1117/12.2570138

Gil Sheleg, N. Tessler

引用次数: 1

Formation of highly crystalline organic semiconductor thin films by inkjet printed thickness gradients 用喷墨印刷厚度梯度形成高结晶有机半导体薄膜

Organic Photonics + Electronics Pub Date : 2020-08-21 DOI: 10.1117/12.2568099

Wontae Park, J. Anthony, W. Wong

引用次数: 0

Nano-photomechanical motion of small particles induced by switching photon force through photochemical processes 光化学过程中由光子力开关引起的小粒子的纳米光力学运动

Organic Photonics + Electronics Pub Date : 2020-08-21 DOI: 10.1117/12.2569231

S. Ito, K. Setoura, H. Miyasaka

{"title":"Nano-photomechanical motion of small particles induced by switching photon force through photochemical processes","authors":"S. Ito, K. Setoura, H. Miyasaka","doi":"10.1117/12.2569231","DOIUrl":"https://doi.org/10.1117/12.2569231","url":null,"abstract":"In the present study, we propose a combined (hybrid) approach of optical manipulation and photochemical reactions for achieving nano-photomechanical motions with small particles. Aa photochemical reactions, we have employed P-type and T-type photochromic reactions of diarylethene (DAE) and pyranoquinazoline (PQ) derivatives, respectively. Single polymer particle containing each of the photochromic compounds was optically trapped in water with a CW visible laser. At this stage, the particle experienced mainly gradient force and was trapped at the focal point of the CW laser. The absorption force was negligible because most of the photochromic molecules in the particle were in the colorless form. UV exposure induced the photoisomerization of the photochromic molecules, resulting in the increase in the number of colored forms. As a result, the absorption force acting on the particle increased and, the position of the particle shifted towards the light propagation direction depending on experimental condition. After turning the UV light off, the particle went back to the original position. The trapped particle thus underwent reciprocal motion synchronizing with the change of photo-response due to the photochromic reactions.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114843491","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}

引用次数: 0

Multi stage and illumination dependent segregation in MAPb(I,Br)3 MAPb(I,Br)的多阶段和依赖光照的分离

Organic Photonics + Electronics Pub Date : 2020-08-21 DOI: 10.1117/12.2568995

Finn Babbe, Eloïse Masquelier, Zhi Zheng, C. Sutter‐Fella

{"title":"Multi stage and illumination dependent segregation in MAPb(I,Br)3","authors":"Finn Babbe, Eloïse Masquelier, Zhi Zheng, C. Sutter‐Fella","doi":"10.1117/12.2568995","DOIUrl":"https://doi.org/10.1117/12.2568995","url":null,"abstract":"An unsolved problem of mixed halide perovskites is the light induced compositional instability. Under illumination microscopic clusters with a higher iodide content form which act as efficient recombination centers reducing device performance. In photoluminescence measurements this leads to the development of a secondary peak at low energies that increases in intensity and shifts towards lower energies. Different theories for about the origin have been developed but the underlying key mechanisms are still under debate. In the presented study the photoluminescence evolution of MAPb(I1.5Br1.5) perovskites with varying microstructure is investigated at various excitation densities and temperatures. We find a more evolved segregation mechanism with an intermediate stage between the commonly reported mixed phase and the appearance of the I-rich clusters (Br content < 50%). In this intermediate stage perovskite domains with nearly pure iodide content form (Br content < 25%). Using low excitation densities, the interplay between the I-rich domains and the I-rich clusters leads to a blue shift of the conjunct I-rich luminescence peak. At high excitation densities the I-rich domains and the I-rich clusters are clearly distinguishable, due to a stronger PL response of the I-rich domains. With continuous illumination more I-rich cluster form acting as carrier traps and recombination centers. Due to this, the influence of the few I-rich domains on the PL signature decreases leaving only the commonly reported red shift of the I-rich clusters at later stages of the segregation. The formation of the I-rich domains is fully reversible in the dark and occurs also at elevated temperatures. Measurements on sample with varying grain size further indicate an enhanced formation of those I-rich domains on samples with high grain boundary density possibly by a faster halide mobility along them.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122783480","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}

引用次数: 0