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Nonlinear optical photovoltaics (presentation video) 非线性光学光伏(演示视频)
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-21 DOI: 10.1117/12.2064384
J. Nunzi, S. Mirzaee
{"title":"Nonlinear optical photovoltaics (presentation video)","authors":"J. Nunzi, S. Mirzaee","doi":"10.1117/12.2064384","DOIUrl":"https://doi.org/10.1117/12.2064384","url":null,"abstract":"Nonlinear absorption was investigated in a poly (3-hexylthiophene) (P3HT) PCBM fullerene blend, one of the most popular organic solar cell’s materials. We observed three-photon absorption in the bulk hetero junction photodiode configuration. The output photocurrent of the photodiode was interpreted in terms of the three-photon absorption properties of the P3HT:PCBM blend at 1550 nm. Can the concept be extrapolated to high efficiency solar cells? We propose an optical antenna technology revisited with plasmonics and organic rectifiers that should permit the development of an ultra-high efficiency PV technology that is compatible with large-area fabrication (self assembling) and low-cost (plastic) technologies.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"27 3-4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132148258","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
TADF for singlet harvesting: next generation OLED materials based on brightly green and blue emitting Cu(I) and Ag(I) compounds 用于单线态收获的TADF:基于亮绿色和蓝色发射Cu(I)和Ag(I)化合物的下一代OLED材料
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2061010
H. Yersin, Markus J. Leitl, R. Czerwieniec
{"title":"TADF for singlet harvesting: next generation OLED materials based on brightly green and blue emitting Cu(I) and Ag(I) compounds","authors":"H. Yersin, Markus J. Leitl, R. Czerwieniec","doi":"10.1117/12.2061010","DOIUrl":"https://doi.org/10.1117/12.2061010","url":null,"abstract":"Detailed photophysical studies are presented for Cu2Cl2(dppb)2 and Ag2Cl2(dppb)2. Both compounds show very effective thermally activated delayed fluorescence (TADF) at ambient temperature with an emission quantum yield of the Ag(I) complex of ΦPL(300 K) = 93 %. This emission is blue shifted by 65 nm (2500 cm-1) with respect to the emission of the Cu(I) complex, demonstrating a valuable strategy for engineering blue light emitters. Potentially, these materials are well suited for taking advantage of the singlet harvesting effect in an OLED device. Moreover, both compounds do not show effects of concentration quenching at high emitter concentration, a property which might be attractive for reducing the efficiency roll-off at higher current densities. Investigations down to T = 1.6 K show that spin-orbit coupling (SOC) is particularly weak. This is displayed in the very long emission decay times of the triplet states (T1 states) of metal-toligand charge transfer (3MLCT) character, amounting to τ(Ag2Cl2(dppb)2) = 1.1 ms and τ(Cu2Cl2(dppb)2) = 2.2 ms. According to the TADF mechanism, which leads to the additional decay channel at ambient temperature via the S1 state (of 1MLCT character), an increase of the radiative rate by a factor of 70 and almost 500 for Ag2Cl2(dppb)2 and Cu2Cl2(dppb)2, respectively, is induced. This results in radiative rates at ambient temperature of kr = 6.2 ∙ 104 s-1 (τr = 16 μs, Ag(I) complex) and 11.7 ∙ 104 s-1 (τr = 8.5 μs, Cu(I) complex). Simple approaches are presented that allow us to understand the weakness of SOC on the basis of results from DFT and TD-DFT calculations. Investigations of the emission decay properties down to T = 1.6 K further support the conclusions with respect to the SOC strength.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115643316","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: 24
To enhance light extraction of OLED devices by multi-optic layers including a micro lens array 利用包括微透镜阵列在内的多光学层增强OLED器件的光提取能力
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2061338
C. Chiu, C. Chien, Yu-Xaong Kuo, Jen-Chi Lee
{"title":"To enhance light extraction of OLED devices by multi-optic layers including a micro lens array","authors":"C. Chiu, C. Chien, Yu-Xaong Kuo, Jen-Chi Lee","doi":"10.1117/12.2061338","DOIUrl":"https://doi.org/10.1117/12.2061338","url":null,"abstract":"In recent years, OLED has advantages including that larger light area, thinner thickness, excellent light uniformity, and can be as a flexible light source. Many display panel and lighting have been started to use the OLED due to OLED without back light system, thus how to make and employ light extracting layer could be important issue to enhance OLED brightness. The purpose of this study is to enhance the light extraction efficiency and light emitting area of OLED, so the micro lens array and the prism reflection layer were provided to enhance the surface light extracting efficiency of OLD. Finally the prism layer and diffusing layer were used to increase the uniformity of emitting area of OLED, which the efficiency of 31% increasing to compare with the OLED without light extracting film.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129666539","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
Two-color emission in three-layer heterostructure OLETs 三层异质结构oled的双色发射
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2060661
K. Jokinen, A. Bykov, T. Fabritius, R. Myllylä
{"title":"Two-color emission in three-layer heterostructure OLETs","authors":"K. Jokinen, A. Bykov, T. Fabritius, R. Myllylä","doi":"10.1117/12.2060661","DOIUrl":"https://doi.org/10.1117/12.2060661","url":null,"abstract":"Two-color emission was observed in three-layer heterostructure organic light emitting transistors (OLETs). These devices consisted of a light-emitting layer made of tris(8-hydroxyquinolinato)aluminium (Alq3) doped with 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM), sandwiched between hole and electron transport layers made of α,ω-dihexyl-quaterthiophene (DH-4T) and α,ω-diperfluorohexyl-quaterthiophene (DFH-4T), respectively. Ambipolar transfer curves were recorded from the fabricated devices, and two-color emission (red and green) was observed during transfer curve acquisition. Red emission was observed to take place at bias conditions supporting hole transport, while green emission occurred when electron-based current was dominant. Moreover, red emission originated from the Alq3:DCM layer, which was verified by comparing the measured spectrum of OLETs to that of corresponding Alq3:DCM organic light-emitting diodes (OLEDs). To investigate the origin of green emission, OLETs were fabricated without an electron transport layer. No green emission was observed, while red emission remained unchanged. Moreover, single-layer transistors and diodes fabricated from DFH-4T expressed green color emission similar to that of three-layer heterostructure OLETs. Therefore, we suggest that green emission originates from the electron transport layer.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133251732","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
Concentration effect on the optical absorption and luminescence properties of disperse red-13 in silica spheres 浓度对分散红-13在硅球中的光吸收和发光性能的影响
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2061447
K. Kang
{"title":"Concentration effect on the optical absorption and luminescence properties of disperse red-13 in silica spheres","authors":"K. Kang","doi":"10.1117/12.2061447","DOIUrl":"https://doi.org/10.1117/12.2061447","url":null,"abstract":"Optical properties of disperse red-13 (DR-13) covalently attached in the silica spheres have been investigated with the two step synthetic processes including a urethane bond formation between a 3-isocyanatopropyl triethoxysilane (ICPTES, -N=C=O) and DR-13 (-OH) with different ratios (3:14, 13:14 and 23:14) of the ICPTES and the DR-13 in pyridine and hydrolysis-condensation reactions between synthesized ICPTES/DR-13 (ICPDR) and tetraethoxyorthosilicate (TEOS) in NH4OH. The absorption peak at 1704 cm-1 representing the -C=O stretching vibration of the spheres attached ICPDR (ICPDRSS) indicates the formation of the urethane bond. Several other absorption peaks originated from ICPDR appeared in the FTIR spectra. The UV-visible absorption peak of the ICPDRSS shifted toward blue with respect to that of DR-13 in methanol, which indicated the antiparallel structure of the DR-13. The photoluminescence peak shifted toward red with the increase of the ratio of DR-13 with respect to ICPTES. This result implies the increase of the intermolecular interaction between DR-13 molecules with the increase of the DR-13 concentration.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134330805","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
Light management in flexible OLEDs 柔性oled的光管理
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2061777
S. Harkema, Raghu K. Pendyala, C. G. C. Geurts, Paul L. J. Helgers, J. W. Levell, Jo S. Wilson, D. Mackerron
{"title":"Light management in flexible OLEDs","authors":"S. Harkema, Raghu K. Pendyala, C. G. C. Geurts, Paul L. J. Helgers, J. W. Levell, Jo S. Wilson, D. Mackerron","doi":"10.1117/12.2061777","DOIUrl":"https://doi.org/10.1117/12.2061777","url":null,"abstract":"Organic light-emitting diodes (OLEDs) are a promising lighting technology. In particular OLEDs fabricated on plastic foils are believed to hold the future. These planar devices are subject to various optical losses, which requires sophisticated light management solutions. Flexible OLEDs on plastic substrates are as prone to losses related to wave guiding as devices on glass. However, we determined that OLEDs on plastic substrates are susceptible to another loss mode due to wave guiding in the thin film barrier. With modeling of white polymer OLEDs fabricated on PEN substrates, we demonstrate that this loss mode is particularly sensitive to polarized light emission. Furthermore, we investigated how thin film barrier approaches can be combined with high index light extraction layers. Our analysis shows that OLEDs with a thin film barrier consisting of an inorganic/organic/inorganic layer sequence, a low index inorganic negatively affects the OLED efficiency. We conclude that high index inorganics are more suitable for usage in high efficiency flexible OLEDs.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114818726","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
High performance hybrid white OLEDs based on new platinum complexes and new blue fluorescence host 基于新型铂配合物和新型蓝色荧光主体的高性能混合白色oled
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2060371
Anurach Poloek, Chieh Wang, Chiao‐Wen Lin, Chin‐Ti Chen, Chao-Tsen Chen
{"title":"High performance hybrid white OLEDs based on new platinum complexes and new blue fluorescence host","authors":"Anurach Poloek, Chieh Wang, Chiao‐Wen Lin, Chin‐Ti Chen, Chao-Tsen Chen","doi":"10.1117/12.2060371","DOIUrl":"https://doi.org/10.1117/12.2060371","url":null,"abstract":"A new series of platinum complexes containing 4-hydroxy-1,5-naphtyridine derivative with different substitutens such as methyl, dimethyl, phenyl, phenoxy, dimethyl amine, piperidine, morpholine, phenoxazine or carbazole unit as the primary ligand and 2-(2,4-difluorophenyl)pyridine as the secondary ligand were synthesized and characterized. Single crystal X-ray diffraction studies of FPtOPhND, FPtCzND and FPtdmaND showed trans-coordinated in distorted square-planar geometry. Their photophysical properties and electrochemical properties were examined. All platinum complexes in these series exhibited dual emissions not only in solution but also in solid state thin film. Employing CBP or 4P-NPD as host material, high efficiency monochromatic and high quality hybrid white organic light emitting diodes (WOLEDs) were achieved with the single platinum complex dopant device, a relatively simple device configuration.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116265570","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
Extremely high efficiency phosphorescent organic light-emitting diodes with horizontal emitting dipoles 具有水平发射偶极子的极高效磷光有机发光二极管
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2062527
Kwon-Hyeon Kim, Chang‐Ki Moon, Jeong-Hwan Lee, Jang‐Joo Kim
{"title":"Extremely high efficiency phosphorescent organic light-emitting diodes with horizontal emitting dipoles","authors":"Kwon-Hyeon Kim, Chang‐Ki Moon, Jeong-Hwan Lee, Jang‐Joo Kim","doi":"10.1117/12.2062527","DOIUrl":"https://doi.org/10.1117/12.2062527","url":null,"abstract":"We present the factors influencing the orientation of the phosphorescent dyes in phosphorescent OLEDs. And, we report that an OLED containing a phosphorescent emitter with horizontally oriented dipoles in an exciplex-forming co-host that exhibits an extremely high EQE of 32.3% and power efficiency of 142 lm/W, the highest values ever reported in literature. Furthermore, we experimentally and theoretically correlated the EQE of OLEDs to the PL quantum yield and the horizontal dipole ratio of phosphorescent dyes using three different dyes.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131305388","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
Virtual screening for OLED materials OLED材料的虚拟筛选
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2066565
M. Halls, D. Giesen, Thomas Hughes, A. Goldberg, Yixiang X. Cao, H. Kwak, J. Gavartin
{"title":"Virtual screening for OLED materials","authors":"M. Halls, D. Giesen, Thomas Hughes, A. Goldberg, Yixiang X. Cao, H. Kwak, J. Gavartin","doi":"10.1117/12.2066565","DOIUrl":"https://doi.org/10.1117/12.2066565","url":null,"abstract":"Organic light-emitting diodes (OLEDs) are under widespread investigation to displace or complement inorganic optoelectronic devices for solid-state lighting and active displays. The materials comprising the active layers in OLED devices are selected or designed to provide the required intrinsic and extrinsic electronic properties needed for efficient charge injection and transport, and desired stability and emissive properties. The chemical design space for OLED materials is enormous and there is need for the development of computational approaches to help identify the most promising chemical solutions for experimental development. In this work we present a multi-scale simulation approach to efficiently screen libraries of potential OLED molecular materials. The workflow to assess potential OLED materials is: 1) evaluation based on first-principles prediction of key intrinsic properties (EHOMO, ELUMO, λe/h, Etriplet), 2) classical simulation of thin film morphology (RDF, ρ), and 3) first-principles evaluation of electron coupling for donor-acceptor pairs (Hab) from the simulated condensed phase morphology.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127263070","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: 6
Interplay between ambient and exciton-induced degradation in organic light-emitting devices 有机发光器件中环境和激子诱导降解之间的相互作用
Optics & Photonics - Photonic Devices + Applications Pub Date : 2014-10-08 DOI: 10.1117/12.2061119
Yingjie Zhang, Qi Wang, H. Aziz
{"title":"Interplay between ambient and exciton-induced degradation in organic light-emitting devices","authors":"Yingjie Zhang, Qi Wang, H. Aziz","doi":"10.1117/12.2061119","DOIUrl":"https://doi.org/10.1117/12.2061119","url":null,"abstract":"Organic light-emitting diode (OLED), albeit is currently used in consumer electronics, still faces challenge with its limited performance stability. The degradation mechanisms that limit the lifetime of OLEDs can generally be separated into two categories: ambient and intrinsic. Much research has been devoted to understanding thus limiting these degradation mechanisms. However, surprisingly, there has been little work on how ambient and intrinsic degradation affect each other. In this work, the interplay between the ambient and intrinsic (more specifically exciton-induced) degradation is studied by comparing the effects of four degradation schemes, namely, no ambient or exciton-induced, ambient only, exciton-induced only and ambient and exciton-induced degradation on device lifetime. The results show that there is no interplay between ambient and exciton-induced degradation. Furthermore, it is evident that no photo-oxidation is present during ambient and exciton-induced degradation.","PeriodicalId":358951,"journal":{"name":"Optics & Photonics - Photonic Devices + Applications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131924356","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
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