Efficient CH3NH3PbI3 Perovskite Solar Cells Based on Graphdiyne (GD)‐Modified P3HT Hole‐Transporting Material |
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| Authors: | Junyan Xiao Jiangjian Shi Huibiao Liu Yuzhuan Xu Songtao Lv Yanhong Luo Dongmei Li Qingbo Meng Yuliang Li |
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| Affiliation: | 1. Key Laboratory for Renewable Energy (CAS)Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condense Matter PhysicsInstitute of PhysicsChinese Academy of Sciences, Beijing, China;2. CAS Key Laboratory of Organic SolidsBeijing National Laboratory for Molecular Sciences (BNLMS), Institute of ChemistryChinese Academy of Sciences, Beijing, P. R. China |
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| Abstract: | Novel large π‐conjugated carbon material, graphdiyne (GD), as a dopant to poly(3‐hexylthiophene) (P3HT) hole‐transporting material (HTM) layer, is introduced into perovskite solar cells for the first time. Raman spectroscopy and ultraviolet photoelectron spectroscopy measurements reveal that relatively strong π–π stacking interaction occurs between GD particles and P3HT (so‐called P3HT/GD composite HTM), favorable for the hole transportation and improvement of the cell performance. On the other hand, some GD aggregates exhibit a scattering nature, and thus help to increase the light absorption of the perovskite solar cells in the long wavelength range. As high as 14.58% light‐to‐electricity conversion efficiency is achieved, superior to the pristine P3HT‐based devices. Additionally, the devices exhibit good stability and reproducibility. Time‐resolved photoluminescence decay measurements reveal that the P3HT/GD HTM can accelerate the hole extraction compared with pristine P3HT. |
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| Keywords: | doping graphdiyne organometal perovskites, poly(3‐hexylthiophene), solar cells |
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