Mesoporous PbI2 assisted growth of large perovskite grains for efficient perovskite solar cells based on ZnO nanorods

JOURNAL OF POWER SOURCES

卷:342

Article

Li, Shibin¹  Zhang, Peng¹  Chen, Hao¹  Wang, Yafei¹  Liu, Detao¹  Wu, Jiang⁴  Sarvari, Hojjatollah^2,3  Chen, Zhi David^1,2,3 

[1] UESTC, Sch Optoelect Informat, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China

[2] Univ Kentucky, Dept Elect & Comp Engn, Lexington, KY 40506 USA

[3] Univ Kentucky, Ctr Nanoscale Sci & Engn, Lexington, KY 40506 USA

[4] UCL, Dept Elect & Elect Engn, Torrington Pl, London WC1E 7JE, England

关键词: Perovskite solar cell;    ZnO nanorods;    Carrier recombination;    Mesoporous PbI2;   

DOI  :  10.1016/j.jpowsour.2017.01.024

来源: Elsevier

【 摘 要 】

Perovskite solar cells (PSCs) have attracted great attention due to their low cost and high power conversion efficiency (PCE). However, the defects and grain boundaries in perovskite films dramatically degrade their performance. Here, we show a two-step annealing method to produce mesoporous PbI2 films for growth of continuous, pinhole-free perovskite films with large grains, followed by additional ethanol vapor annealing of perovskite films to reduce the defects and grain boundaries. The large perovskite grains dramatically suppress the carrier recombination, and consequently we obtain ZnO-nanorod-based PSCs that exhibit the best efficiency of 173%, with high reproducibility. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free