TY - JOUR
T1 - High efficiency planar Sn-Pb binary perovskite solar cells
T2 - controlled growth of large grains via a one-step solution fabrication process
AU - Li, Lingang
AU - Zhang, Fan
AU - Hao, Yuying
AU - Sun, Qinjun
AU - Li, Zhanfeng
AU - Wang, Hua
AU - Cui, Yanxia
AU - ZHU, Fu Rong
N1 - Funding Information:
This research work was financially supported by the National Natural Scientific Foundation of China (61274056, 61475109 and 61571317), the Key Research and Development (International Cooperation) Program of Shanxi (201603D421042), and the Platform and Base Special Project of Shanxi (201605D131038). Y. Cui also acknowledges the Young Talents Program and the Young Sanjin Scholars Program of Shanxi Province. F. R. Zhu acknowledges the support from the Research Grants Council of Hong Kong Special Administrative Region, China, Project No. T23-713/11, GRF12303114 and the Faculty Research Grant, FRG2/15-16/072.
PY - 2017
Y1 - 2017
N2 - One-step solution fabrication of high-performance Sn-including perovskite solar cells (PSCs) is very challenging due to the rapid crystallization of the Sn-based perovskite layer, leading to a poor film morphology and low surface coverage. In this work, a well-controlled one-step method, assisted by a multi-step solvent treatment, is developed for the growth of a high-quality CH3NH3Pb(1−x)SnxI3 (0 ≤ x ≤ 1) perovskite film on a planar PEDOT:PSS substrate. The CH3NH3Sn0.25Pb0.75I3 perovskite films consisting of densely packed and uniformly distributed large crystal grains were obtained using sec-butyl alcohol solvent engineering and N,N-dimethylformamide solvent annealing under an N2 atmosphere. The CH3NH3Sn0.25Pb0.75I3-based PSCs with a maximum power conversion efficiency (PCE) of 12.08% and an average PCE of 11.01% were obtained. The PSCs also exhibit excellent performance reproducibility, good air stability and weak hysteresis behavior. The enhancement in the performance of the PSCs is attributed to the well-crystallized CH3NH3Sn0.25Pb0.75I3 film, resulting in simultaneous improvement in charge-carrier transport properties and reduction in charge-carrier recombination, a very promising approach to obtain high performance Sn-including perovskite solar cells.
AB - One-step solution fabrication of high-performance Sn-including perovskite solar cells (PSCs) is very challenging due to the rapid crystallization of the Sn-based perovskite layer, leading to a poor film morphology and low surface coverage. In this work, a well-controlled one-step method, assisted by a multi-step solvent treatment, is developed for the growth of a high-quality CH3NH3Pb(1−x)SnxI3 (0 ≤ x ≤ 1) perovskite film on a planar PEDOT:PSS substrate. The CH3NH3Sn0.25Pb0.75I3 perovskite films consisting of densely packed and uniformly distributed large crystal grains were obtained using sec-butyl alcohol solvent engineering and N,N-dimethylformamide solvent annealing under an N2 atmosphere. The CH3NH3Sn0.25Pb0.75I3-based PSCs with a maximum power conversion efficiency (PCE) of 12.08% and an average PCE of 11.01% were obtained. The PSCs also exhibit excellent performance reproducibility, good air stability and weak hysteresis behavior. The enhancement in the performance of the PSCs is attributed to the well-crystallized CH3NH3Sn0.25Pb0.75I3 film, resulting in simultaneous improvement in charge-carrier transport properties and reduction in charge-carrier recombination, a very promising approach to obtain high performance Sn-including perovskite solar cells.
UR - http://www.scopus.com/inward/record.url?scp=85014562572&partnerID=8YFLogxK
U2 - 10.1039/c6tc05325d
DO - 10.1039/c6tc05325d
M3 - Journal article
AN - SCOPUS:85014562572
SN - 2050-7526
VL - 5
SP - 2360
EP - 2367
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 9
ER -
