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Thin films

Comprehensive Investigation and Analysis of Bulk-Heterojunction Microstructure of High-Performance PCE11:PCBM Solar Cells

Zhang, Chaohong; Heumueller, Thomas; Gruber, Wolfgang; Almora, Osbel; Du, Xiaoyan; Ying, Lei; Chen, Junwu; Unruh, Tobias; Cao, Yong; Li, Ning; Brabec, Christoph J.

 (Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Comprehensive Investigation and Analysis of Bulk-Heterojunction Microstructure of High-Performance PCE11:PCBM Solar Cells

Zhang, Chaohong; Heumueller, Thomas; Gruber, Wolfgang; Almora, Osbel; Du, Xiaoyan; Ying, Lei; Chen, Junwu; Unruh, Tobias; Cao, Yong; Li, Ning; Brabec, Christoph J.

Worldwide research efforts have been devoted to organic photovoltaics in the hope of a large-scale commercial application in the near future. To meet the industrial production requirements, organic photovoltaics that can reach power conversion efficiency (PCE) of over 10% along with promising operational device stability are of utmost interest. In…
A top-down strategy identifying molecular phase stabilizers to overcome microstructure instabilities in organic solar cells

Zhang, Chaohong; Heumueller, Thomas; Leon, Salvador; Gruber, Wolfgang; Burlafinger, Klaus; Tang, Xiaofeng; Perea, Jose D.; Wabra, Isabell; Hirsch, Andreas; Unruh, Tobias; Li, Ning; Brabec, Christoph J.

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsGISAXSGIWAXSMaterialRenewable energySurface structure and patternsTechniqueThin films

A top-down strategy identifying molecular phase stabilizers to overcome microstructure instabilities in organic solar cells

Zhang, Chaohong; Heumueller, Thomas; Leon, Salvador; Gruber, Wolfgang; Burlafinger, Klaus; Tang, Xiaofeng; Perea, Jose D.; Wabra, Isabell; Hirsch, Andreas; Unruh, Tobias; Li, Ning; Brabec, Christoph J.

The operational stability of organic solar cells (OSCs) is the essential barrier to commercialization. Compared to thermally-induced degradation, photo-stability of OSCs is far away from being resolved. Here, we demonstrate that the thermal- and photo-degradation of metastable bulk-heterojunction OSCs are governed by the same mechanism. Understanding the fundamental principles behind…
Morphological Evolution of Poly(solketal methacrylate)-block-polystyrene Copolymers in Thin Films

Yu, Duk Man; Smith, Darren M.; Kim, Hyeyoung; Mapas, Jose Kenneth D.; Rzayev, Javid; Russell, Thomas P.

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsGISAXSMaterialOrientation analysisPolymer researchSelf-assembled materialSurface structure and patternsTechniqueThin films

Morphological Evolution of Poly(solketal methacrylate)-block-polystyrene Copolymers in Thin Films

Yu, Duk Man; Smith, Darren M.; Kim, Hyeyoung; Mapas, Jose Kenneth D.; Rzayev, Javid; Russell, Thomas P.

The morphological evolution of the lamellar microdomains in the thin films of symmetric poly(solketal methacrylate-b-styrene) (PSM-b-PS) copolymers that can be converted into poly(glycerol monomethacrylate-b-styrene) (PGM-b-PS) copolymers through acid hydrolysis reaction was investigated. This simple chemical transformation was performed in the solid state using trifluoroacetic acid vapor,…
Controlling Processing, Morphology, and Mechanical Performance in Blends of Polylactide and Thermotropic Polyesters

de Kort, Gijs W.; Rastogi, Sanjay; Wilsens, Carolus H. R. M.

 ApplicationCharacteristic dimensionCharacterizationCustomer publicationsGIWAXSInorganic materialMaterialRenewable energyTechniqueThin films

Controlling Processing, Morphology, and Mechanical Performance in Blends of Polylactide and Thermotropic Polyesters

de Kort, Gijs W.; Rastogi, Sanjay; Wilsens, Carolus H. R. M.

Thermoplastic composites based on thermotropic liquid crystalline polymer (LCP) materials are interesting candidates for reinforced composite application due to their promising mechanical performance and potential for recyclability. In combination with a societal push toward the more sustainable use of materials, these properties warrant new interest in this class of composites.…
Simply planarizing nonfused perylene diimide based acceptors toward promising non-fullerene solar cells

Bian, Gao-Feng; Zhao, Feng; Lau, Tsz-Ki; Sheng, Chun-Qi; Lu, Xinhui; Du, Hui; Zhang, Cheng; Qu, Zhi-Rong; Chen, Hongzheng; Wan, Jun-Hua

 (Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Simply planarizing nonfused perylene diimide based acceptors toward promising non-fullerene solar cells

Bian, Gao-Feng; Zhao, Feng; Lau, Tsz-Ki; Sheng, Chun-Qi; Lu, Xinhui; Du, Hui; Zhang, Cheng; Qu, Zhi-Rong; Chen, Hongzheng; Wan, Jun-Hua

This work focuses on developing high-efficiency perylene diimide (PDI)-based small molecular nonfullerene acceptors with a simple synthetic strategy. We reported a new electron acceptor, Py-e-PDI, obtained via cross-coupling four PDI units with a planar pyrene core through ethynyl groups. Although the ring-fusion synthetic procedure was omitted, the large planar core…
Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core

Yuan, Jun; Zhang, Yunqiang; Zhou, Liuyang; Zhang, Guichuan; Yip, Hin-Lap; Lau, Tsz-Ki; Lu, Xinhui; Zhu, Can; Peng, Hongjian; Johnson, Paul A.; Leclerc, Mario; Cao, Yong; Ulanski, Jacek; Li, Yongfang; Zou, Yingping

 (Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Single-Junction Organic Solar Cell with over 15% Efficiency Using Fused-Ring Acceptor with Electron-Deficient Core

Yuan, Jun; Zhang, Yunqiang; Zhou, Liuyang; Zhang, Guichuan; Yip, Hin-Lap; Lau, Tsz-Ki; Lu, Xinhui; Zhu, Can; Peng, Hongjian; Johnson, Paul A.; Leclerc, Mario; Cao, Yong; Ulanski, Jacek; Li, Yongfang; Zou, Yingping

Summary Recently, non-fullerene n-type organic semiconductors have attracted significant attention as acceptors in organic photovoltaics (OPVs) due to their great potential to realize high-power conversion efficiencies. The rational design of the central fused ring unit of these acceptor molecules is crucial to maximize device performance. Here, we report a new…
Charge carrier transport and nanomorphology control for efficient non-fullerene organic solar cells

Hu, Hanlin; Deng, Wanyuan; Qin, Minchao; Yin, Hang; Lau, Tsz-Ki; Fong, Patrick W. K.; Ren, Zhiwei; Liang, Qiong; Cui, Li; Wu, Hongbin; Lu, Xinhui; Zhang, Weimin; McCulloch, Iain; Li, Gang

 (Natural) polymersApplicationCharacterizationCustomer publicationsFractal dimensionGISAXSGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Charge carrier transport and nanomorphology control for efficient non-fullerene organic solar cells

Hu, Hanlin; Deng, Wanyuan; Qin, Minchao; Yin, Hang; Lau, Tsz-Ki; Fong, Patrick W. K.; Ren, Zhiwei; Liang, Qiong; Cui, Li; Wu, Hongbin; Lu, Xinhui; Zhang, Weimin; McCulloch, Iain; Li, Gang

Single junction organic photovoltaic devices (OPVs) have exceeded 15% power conversion efficiency (PCE) with the help of fused ring based low-bandgap non-fullerene acceptors (NFAs). As a major type of NFA, the indacenodithiophene derivative NFA (IDTBR) has been shown to have superior OPV stability with outstanding VOC, but the efficiency is…
Fused thienobenzene-thienothiophene electron acceptors for organic solar cells

Xu, Ye; Jiang, Haotian; Lau, Tsz-Ki; Zhu, Jingshuai; Wang, Jiayu; Lu, Xinhui; Zhan, Xiaowei; Lin, Yuze

 (Natural) polymersApplicationCharacterizationCustomer publicationsGIWAXSMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Fused thienobenzene-thienothiophene electron acceptors for organic solar cells

Xu, Ye; Jiang, Haotian; Lau, Tsz-Ki; Zhu, Jingshuai; Wang, Jiayu; Lu, Xinhui; Zhan, Xiaowei; Lin, Yuze

Small molecule ladder-type heteroarenes IHBT-2F is designed and synthesized with strong electron-donating and molecular packing properties, where the central unit, fused thienobenzene-thienothiphene (IHBT), is attached with the strong electron-deficient 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (2FIC) as the end group. The counterpart IDBT-2F with…
Tailoring vertical phase distribution of quasi-two-dimensional perovskite films via surface modification of hole-transporting layer

Liu, Tiefeng; Jiang, Youyu; Qin, Minchao; Liu, Junxue; Sun, Lulu; Qin, Fei; Hu, Lin; Xiong, Sixing; Jiang, Xueshi; Jiang, Fangyuan; Peng, Ping; Jin, Shengye; Lu, Xinhui; Zhou, Yinhua

 ApplicationCharacterizationCustomer publicationsGIWAXSInorganic materialMaterialRenewable energySurface structure and patternsTechniqueThin films

Tailoring vertical phase distribution of quasi-two-dimensional perovskite films via surface modification of hole-transporting layer

Liu, Tiefeng; Jiang, Youyu; Qin, Minchao; Liu, Junxue; Sun, Lulu; Qin, Fei; Hu, Lin; Xiong, Sixing; Jiang, Xueshi; Jiang, Fangyuan; Peng, Ping; Jin, Shengye; Lu, Xinhui; Zhou, Yinhua

Vertical phase distribution plays an important role in the quasi-two-dimensional perovskite solar cells. So far, the driving force and how to tailor the vertical distribution of layer numbers have been not discussed. In this work, we report that the vertical distribution of layer numbers in the quasi-two-dimensional perovskite films deposited…
Two-dimensional inverted planar perovskite solar cells with efficiency over 15% via solvent and interface engineering

Lian, Xiaomei; Chen, Jiehuan; Zhang, Yingzhu; Tian, Shuoxun; Qin, Minchao; Li, Jun; Andersen, Thomas Rieks; Wu, Gang; Lu, Xinhui; Chen, Hongzheng

 ApplicationCharacterizationCustomer publicationsGIWAXSInorganic materialMaterialOrientation analysisRenewable energySurface structure and patternsTechniqueThin films

Two-dimensional inverted planar perovskite solar cells with efficiency over 15% via solvent and interface engineering

Lian, Xiaomei; Chen, Jiehuan; Zhang, Yingzhu; Tian, Shuoxun; Qin, Minchao; Li, Jun; Andersen, Thomas Rieks; Wu, Gang; Lu, Xinhui; Chen, Hongzheng

High short-circuit current (Jsc) and open-circuit voltage (Voc) are both required for two-dimensional (2D) perovskite solar cells (PVSCs) with high power conversion efficiency (PCE). In this work, solvent engineering is combined with interface engineering to fabricate 2D PVSCs with enhanced Jsc and Voc. Mixing formamide with N,N-dimethylformamide (DMF) was found…
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