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Versatile Sequential Casting Processing for Highly Efficient and Stable Binary Organic Photovoltaics.
He, Chengliang; Pan, Youwen; Lu, Guanghao; Wu, Baohua; Xia, Xinxin; Ma, Chang-Qi; Chen, Zeng; Zhu, Haiming; Lu, Xinhui; Ma, Wei; Zuo, Lijian; Chen, Hongzheng.
Afiliación
  • He C; State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
  • Pan Y; State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
  • Lu G; Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710054, P. R. China.
  • Wu B; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
  • Xia X; Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, 999077, P. R. China.
  • Ma CQ; i-Lab & Printable Electronics Research Centre, Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou, 215123, P. R. China.
  • Chen Z; Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China.
  • Zhu H; Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China.
  • Lu X; Department of Physics, Chinese University of Hong Kong, New Territories, Hong Kong, 999077, P. R. China.
  • Ma W; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
  • Zuo L; State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
  • Chen H; State Key Laboratory of Silicon Materials, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
Adv Mater ; 34(33): e2203379, 2022 Aug.
Article en En | MEDLINE | ID: mdl-35765940
ABSTRACT
Forming an ideal bulk heterojunction (BHJ) morphology is a critical issue governing the photon to electron process in organic solar cells (OSCs). Complementary to the widely-used blend casting (BC) method for BHJ construction, sequential casting (SC) can also enable similar or even better morphology and device performance for OSCs. Here, BC and SC methods on three representative donoracceptor (DA) blends are utilized, that is, PM6PC71 BM, PM6IT-4F and PM6L8-BO. Higher power conversion efficiencies (PCEs) in all cases by taking advantage of beneficial morphology from SC processing are achieved, and a champion PCE of 18.86% (certified as 18.44%) based on the PM6L8-BO blend is reached, representing the record value among binary OSCs. The observations on phase separation and vertical distribution inspire the proposal of the swelling-intercalation phase-separation model to interpret the morphology evolution during SC processing. Further, the vertical phase segregation is found to deliver an improvement of device performance via affecting the charge transport and collection processes, as evidenced by the DA-ratio-dependent photovoltaic properties. Besides, OSCs based on SC processing show advantages on device photostability and upscale fabrication. This work demonstrates the versatility and efficacy of the SC method for BHJ-based OSCs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2022 Tipo del documento: Article
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2022 Tipo del documento: Article