摘要
Considering the robust and stable nature of the active layers,advancing the power conversion efficiency(PCE)has long been the priority for all-polymer solar cells(all-PSCs).Despite the recent surge of PCE,the photovoltaic parameters of the stateof-the-art all-PSC still lag those of the polymer:small molecule-based devices.To compete with the counterparts,judicious modulation of the morphology and thus the device electrical properties are needed.It is difficult to improve all the parameters concurrently for the all-PSCs with advanced efficiency,and one increase is typically accompanied by the drop of the other(s).In this work,with the aids of the solvent additive(1-chloronaphthalene)and the n-type polymer additive(N2200),we can fine-tune the morphology of the active layer and demonstrate a 16.04%efficient all-PSC based on the PM6:PY-IT active layer.The grazing incidence wideangle X-ray scattering measurements show that the shape of the crystallites can be altered,and the reshaped crystallites lead to enhanced and more balanced charge transport,reduced recombination,and suppressed energy loss,which lead to concurrently improved and device efficiency and stability.
基金
supported by the National Key Research and Development Program of China (number:2019YFA0705900)funded by MOST
the Basic and Applied Basic Research Major Program of Guangdong Province (number:2019B030302007)
Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (project number:2019B121205002)
the Shen Zhen Technology and Innovation Commission (project numbers:JCYJ20170413173814007 and JCYJ20170818113905024)
the Hong Kong Research Grants Council (Research Impact Fund R6021-18,collaborative research fund C6023-19G,project numbers:16309218,16310019,and 16303917)
Hong Kong Innovation and Technology Commission for the support through projects (ITC-CNERC14SC01 and ITS/471/18)
National Natural Science Foundation of China (NSFC,number:91433202)
support from National Natural Science Foundation of China 21927811
support from the Swedish Research Council VR (2016-06146)
the Swedish Research Council and The Knut and Alice Wallenberg Foundation (2017.0186,2016.0059)
the support from Natural Science Foundation of Top Talent of SZTU (grant number:20200205)
the support from Hong Kong PhD Fellowship Scheme PF17-03929
the project funded by China Postdoctoral Science Foundation (2020M673054)
Postdoctoral Fund of Jinan University,and National Natural Science Foundation of China (22005121).
