The photovoltaic performance of perovskite solar cells (PSCs) largely depends on the crystal grain size of perovskite films. Here, we use the mixture of n-octyltrimethoxysilane (OTES) and aminopropyltrimethoxysilane (APTES) to tailor the surface termination state of SnO2 electron transport layer, and demonstrate the crystal grain size of perovskite is remarkably enlarged. The perovskite film with large crystal size shows a lower non-radical recombination density and a longer charge lifetime. The power conversion efficiency of PSCs is eventually improved from 18.21% to 20.3%. The proposed method may also impact other optoelectronic devices based perovskite films.
|Journal||Journal of Power Sources|
|State||Published - Nov 30 2019|
Bibliographical noteFunding Information:
This work was supported by National Natural Science Foundation of China under Grant Nos. 61874150 , 61421002 and 61574029 . This work was also partially supported by University of Kentucky . The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. The authors declare no competing financial interests.
© 2019 Elsevier B.V.
- Perovskite solar cells
- Surface terminal
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering