TY - JOUR
T1 - Facet-Dependent Control of PbI 2 Colloids for over 20% Efficient Perovskite Solar Cells
AU - Ran, Chenxin
AU - Gao, Weiyin
AU - Li, Nengxu
AU - Xia, Yingdong
AU - Li, Qi
AU - Wu, Zhaoxin
AU - Zhou, Huanping
AU - Chen, Yonghua
AU - Wang, Minqiang
AU - Huang, Wei
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2019/1/11
Y1 - 2019/1/11
N2 - Organic-inorganic hybrid perovskite-based solar cells (PSCs) have made impressive progress during the past few years, and record power conversion efficiency over 23% has been achieved. However, for solution-processed perovskite films, one of the major challenges for film quality improvement is the lack of a regulation strategy for the colloids in the precursor solution. Here, we demonstrate facet-dependent colloid engineering to adjust the quality of a perovskite film and its photovoltaic performance. This is realized by the development of a facet passivation strategy to synthesize PbI 2 (S-PbI 2 ) with tunable morphology. Further, facet-dependent PbI 2 colloid regulation is demonstrated, and the relations among the morphology of the PbI 2 crystal, features of PbI 2 colloids, the morphology of the PbI 2 film, and the photovoltaic performance of MAPbI 3 are established. The PSCs based on 10% S-PbI 2 exhibited a best PCE of 20.22% with improved device reproducibility and hysteresis index compared to that using commercial PbI 2 (∼18%).
AB - Organic-inorganic hybrid perovskite-based solar cells (PSCs) have made impressive progress during the past few years, and record power conversion efficiency over 23% has been achieved. However, for solution-processed perovskite films, one of the major challenges for film quality improvement is the lack of a regulation strategy for the colloids in the precursor solution. Here, we demonstrate facet-dependent colloid engineering to adjust the quality of a perovskite film and its photovoltaic performance. This is realized by the development of a facet passivation strategy to synthesize PbI 2 (S-PbI 2 ) with tunable morphology. Further, facet-dependent PbI 2 colloid regulation is demonstrated, and the relations among the morphology of the PbI 2 crystal, features of PbI 2 colloids, the morphology of the PbI 2 film, and the photovoltaic performance of MAPbI 3 are established. The PSCs based on 10% S-PbI 2 exhibited a best PCE of 20.22% with improved device reproducibility and hysteresis index compared to that using commercial PbI 2 (∼18%).
UR - http://www.scopus.com/inward/record.url?scp=85059814635&partnerID=8YFLogxK
U2 - 10.1021/acsenergylett.8b02262
DO - 10.1021/acsenergylett.8b02262
M3 - 文章
AN - SCOPUS:85059814635
SN - 2380-8195
VL - 4
SP - 358
EP - 367
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 1
ER -
