Each component layer in a perovskite solar cell plays an important role in the cell performance. Here, a few types of polymers including representative p-type and n-type semiconductors, and a classical insulator, are chosen to dope into a perovskite film. The long-chain polymer helps to form a network among the perovskite crystalline grains, as witnessed by the improved film morphology and device stability. The dewetting process is greatly suppressed by the cross-linking effect of the polymer chains, thereby resulting in uniform perovskite films with large grain sizes. Moreover, it is found that the polymer-doped perovskite shows a reduced trap-state density, likely due to the polymer effectively passivating the perovskite grain surface. Meanwhile the doped polymer formed a bridge between grains for efficient charge transport. Using this approach, the solar cell efficiency is improved from 17.43% to as high as 19.19%, with a much improved stability. As it is not required for the polymer to have a strict energy level matching with the perovskite, in principle, one may use a variety of polymers for this type of device design.
%0 Journal Article
%1 AENM:AENM201701757
%A Jiang, Jiexuan
%A Wang, Qian
%A Jin, Zhiwen
%A Zhang, Xisheng
%A Lei, Jie
%A Bin, Haijun
%A Zhang, Zhi-Guo
%A Li, Yongfang
%A Liu, Shengzhong (Frank)
%D 2017
%J Advanced Energy Materials
%K doping organic perovskite transportlayer
%P n/a--n/a
%R 10.1002/aenm.201701757
%T Polymer Doping for High-Efficiency Perovskite Solar Cells with Improved Moisture Stability
%U http://dx.doi.org/10.1002/aenm.201701757
%X Each component layer in a perovskite solar cell plays an important role in the cell performance. Here, a few types of polymers including representative p-type and n-type semiconductors, and a classical insulator, are chosen to dope into a perovskite film. The long-chain polymer helps to form a network among the perovskite crystalline grains, as witnessed by the improved film morphology and device stability. The dewetting process is greatly suppressed by the cross-linking effect of the polymer chains, thereby resulting in uniform perovskite films with large grain sizes. Moreover, it is found that the polymer-doped perovskite shows a reduced trap-state density, likely due to the polymer effectively passivating the perovskite grain surface. Meanwhile the doped polymer formed a bridge between grains for efficient charge transport. Using this approach, the solar cell efficiency is improved from 17.43% to as high as 19.19%, with a much improved stability. As it is not required for the polymer to have a strict energy level matching with the perovskite, in principle, one may use a variety of polymers for this type of device design.
@article{AENM:AENM201701757,
abstract = {Each component layer in a perovskite solar cell plays an important role in the cell performance. Here, a few types of polymers including representative p-type and n-type semiconductors, and a classical insulator, are chosen to dope into a perovskite film. The long-chain polymer helps to form a network among the perovskite crystalline grains, as witnessed by the improved film morphology and device stability. The dewetting process is greatly suppressed by the cross-linking effect of the polymer chains, thereby resulting in uniform perovskite films with large grain sizes. Moreover, it is found that the polymer-doped perovskite shows a reduced trap-state density, likely due to the polymer effectively passivating the perovskite grain surface. Meanwhile the doped polymer formed a bridge between grains for efficient charge transport. Using this approach, the solar cell efficiency is improved from 17.43% to as high as 19.19%, with a much improved stability. As it is not required for the polymer to have a strict energy level matching with the perovskite, in principle, one may use a variety of polymers for this type of device design.},
added-at = {2017-11-14T11:26:39.000+0100},
author = {Jiang, Jiexuan and Wang, Qian and Jin, Zhiwen and Zhang, Xisheng and Lei, Jie and Bin, Haijun and Zhang, Zhi-Guo and Li, Yongfang and Liu, Shengzhong (Frank)},
biburl = {https://www.bibsonomy.org/bibtex/246c10c5aa54d36fe13a7ec14acd27020/bretschneider_m},
doi = {10.1002/aenm.201701757},
interhash = {272f7f7755724397d6d90c1748651b50},
intrahash = {46c10c5aa54d36fe13a7ec14acd27020},
issn = {1614-6840},
journal = {Advanced Energy Materials},
keywords = {doping organic perovskite transportlayer},
pages = {n/a--n/a},
timestamp = {2017-11-14T11:26:39.000+0100},
title = {Polymer Doping for High-Efficiency Perovskite Solar Cells with Improved Moisture Stability},
url = {http://dx.doi.org/10.1002/aenm.201701757},
year = 2017
}