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 PbI2films 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 17.3%, with high reproducibility.
|Number of pages||8|
|Journal||Journal of Power Sources|
|State||Published - 2017|
Bibliographical noteFunding Information:
This work was supported by National Natural Science Foundation of China under Grant Nos. 61574029, 61371046, and 61421002, and National Higher-education Institution General Research and Development Fund (ZYGX2014J044). This work was also partially supported by University of Kentucky.
© 2017 Elsevier B.V.
- Carrier recombination
- Mesoporous PbI
- Perovskite solar cell
- ZnO nanorods
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering