TY - JOUR
T1 - Chelate-Pb Intermediate Engineering for High-Efficiency Perovskite Solar Cells
AU - Niu, Jinzhi
AU - Yang, Dong
AU - Yang, Zhou
AU - Wang, Dapeng
AU - Zhu, Xuejie
AU - Zhang, Xiaorong
AU - Zuo, Shengnan
AU - Feng, Jiangshan
AU - Liu, Shengzhong Frank
N1 - Funding Information:
The authors acknowledge support by the NFSC with the number of 61604090, the National Key Research Program of China with the number of 2016YFA0202403, the National University Research Fund with the number of GK26100100, the Innovative Research Team with the number of IRT_14R33, and the Chinese National 1000 Talents Plan program.
PY - 2018/5/2
Y1 - 2018/5/2
N2 - Crystallization quality and grain size are key factors in fabricating high-performance planar-type perovskite photovoltaics. Herein, we used 1,8-octanedithiol as an effective additive in the [HC(NH2)2]0.95Cs0.05PbI3 (FA0.95Cs0.05PbI3) solution to improve the FA0.95Cs0.05PbI3 film quality via solution processing. 1,8-Octanedithiol would coordinate with lead to form the chelate-Pb compound, leading to smaller Gibbs free energy during the perovskite crystallization process, facilitating formation of high-quality perovskite films with larger grains, smoother surfaces, lower electron trap densities, and longer carrier lifetimes compared to the nonadditive ones. As a result, the champion efficiency for devices with 3% 1,8-octanedithiol-doped FA0.95Cs0.05PbI3 is raised to 19.36% from 18.39% of a device without the additive. The new technique is a promising way to fabricate perovskite photovoltaics with high performance.
AB - Crystallization quality and grain size are key factors in fabricating high-performance planar-type perovskite photovoltaics. Herein, we used 1,8-octanedithiol as an effective additive in the [HC(NH2)2]0.95Cs0.05PbI3 (FA0.95Cs0.05PbI3) solution to improve the FA0.95Cs0.05PbI3 film quality via solution processing. 1,8-Octanedithiol would coordinate with lead to form the chelate-Pb compound, leading to smaller Gibbs free energy during the perovskite crystallization process, facilitating formation of high-quality perovskite films with larger grains, smoother surfaces, lower electron trap densities, and longer carrier lifetimes compared to the nonadditive ones. As a result, the champion efficiency for devices with 3% 1,8-octanedithiol-doped FA0.95Cs0.05PbI3 is raised to 19.36% from 18.39% of a device without the additive. The new technique is a promising way to fabricate perovskite photovoltaics with high performance.
UR - https://www.scopus.com/pages/publications/85046372788
UR - https://www.scopus.com/pages/publications/85046372788#tab=citedBy
U2 - 10.1021/acsami.8b02257
DO - 10.1021/acsami.8b02257
M3 - Article
C2 - 29637768
AN - SCOPUS:85046372788
SN - 1944-8244
VL - 10
SP - 14744
EP - 14750
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 17
ER -