Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 23, Pages 12937-12942Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b02705
Keywords
perovskite; solar cell; sequential solution deposition; recombination; CH3NH3I
Funding
- National Science Foundation of China [91122034, 51125006, 61376056, 61204072]
- Science and Technology Commission of Shanghai [13JC1405700, 14520722000]
- U.S. National Science Foundation [CBET-1150617]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1150617] Funding Source: National Science Foundation
Ask authors/readers for more resources
Sequential deposition is a widely adopted method to prepare CH3NH3PbI3 on mesostructured TiO2 electrode for organic lead halide perovskite solar cells. However, this method often suffers from the uncontrollable crystal size, surface morphology, and residual PbI2 in the resulting CH3NH3PbI3, which are all detrimental to the device performance. We herein present an optimized sequential solution deposition method by introducing different amount of CH3NH3I in PbI2 precursor solution in the first step to prepare CH3NH3PbI3 absorber on mesoporous TiO2 substrates. The addition of CH3NH3I in PbI2 precursor solution can affect the crystallization and composition of PbI2 raw films, resulting in the variation of UV-vis absorption and surface morphology. Proper addition of CH3NH3I not only enhances the absorption but also improves the efficiency of CH3NH3PbI3 solar cells from 11.13% to 13.37%. Photoluminescence spectra suggest that the improvement of device performance is attributed to the decrease of recombination rate of carriers in CH3NH3PbI3 absorber. This current method provides a highly repeatable route for enhancing the efficiency of CH3NH3PbI3 solar cell in the sequential solution deposition method.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available