TY - JOUR
T1 - A Polymer Defect Passivator for Efficient Hole-Conductor-Free Printable Mesoscopic Perovskite Solar Cells
AU - Xiang, Junwei
AU - Han, Chuanzhou
AU - Qi, Jianhang
AU - Cheng, Yanjie
AU - Chen, Kai
AU - Ma, Yongming
AU - Xie, Jiayu
AU - Hu, Yue
AU - Mei, Anyi
AU - Zhou, Yinhua
AU - Han, Hongwei
N1 - Funding Information:
The authors acknowledge the financial support from the National Natural Science Foundation of China (Grant No. 22075094, 52172198, and 51902117). The authors would like to thank the Analytical and Testing Center of Huazhong University of Science and Technology, and the Instrumental Analysis Center of Shanghai Jiao Tong University for performing various of characterizations.
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/3/15
Y1 - 2023/3/15
N2 - Due to the low cost and excellent potential for mass production, printable mesoscopic perovskite solar cells (p-MPSCs) have drawn a lot of attention among other device structures. However, the low open-circuit voltage (VOC) of such devices restricts their power conversion efficiency (PCE). This limitation is brought by the high defect density at perovskite grain boundaries in the mesoporous scaffold, which results in severe nonradiative recombination and is detrimental to the VOC. To improve the perovskite crystallization process, passivate the perovskite defects, and enhance the PCE, additive engineering is an effective way. Herein, a polymeric Lewis base polysuccinimide (PSI) is added to the perovskite precursor solution as an additive. It improves the perovskite crystallinity and its carbonyl groups strongly coordinate with Pb2+, which can effectively passivate defects. Additionally, compared with its monomer, succinimide (SI), PSI serves as a better defect passivator because the long-chained macromolecule can be firmly anchored on those defect sites and form a stronger interaction with perovskite grains. As a result, the champion device has a PCE of 18.84%, and the VOC rises from 973 to 1030 mV. This study offers a new strategy for fabricating efficient p-MPSCs.
AB - Due to the low cost and excellent potential for mass production, printable mesoscopic perovskite solar cells (p-MPSCs) have drawn a lot of attention among other device structures. However, the low open-circuit voltage (VOC) of such devices restricts their power conversion efficiency (PCE). This limitation is brought by the high defect density at perovskite grain boundaries in the mesoporous scaffold, which results in severe nonradiative recombination and is detrimental to the VOC. To improve the perovskite crystallization process, passivate the perovskite defects, and enhance the PCE, additive engineering is an effective way. Herein, a polymeric Lewis base polysuccinimide (PSI) is added to the perovskite precursor solution as an additive. It improves the perovskite crystallinity and its carbonyl groups strongly coordinate with Pb2+, which can effectively passivate defects. Additionally, compared with its monomer, succinimide (SI), PSI serves as a better defect passivator because the long-chained macromolecule can be firmly anchored on those defect sites and form a stronger interaction with perovskite grains. As a result, the champion device has a PCE of 18.84%, and the VOC rises from 973 to 1030 mV. This study offers a new strategy for fabricating efficient p-MPSCs.
KW - carbon electrodes
KW - crystallization improvements
KW - defect passivation
KW - polymeric Lewis bases
KW - printable mesoscopic perovskite solar cells
U2 - 10.1002/adfm.202300473
DO - 10.1002/adfm.202300473
M3 - Article
AN - SCOPUS:85150743257
SN - 1616-301X
JO - Advanced Functional Materials
JF - Advanced Functional Materials
ER -