TY - JOUR
T1 - Self-Elimination of Intrinsic Defects Improves the Low-Temperature Performance of Perovskite Photovoltaics
AU - Chen, Yihua
AU - Tan, Shunquan
AU - Li, Nengxu
AU - Huang, Bolong
AU - Niu, Xiuxiu
AU - Li, Liang
AU - Sun, Mingzi
AU - Zhang, Yu
AU - Zhang, Xiao
AU - Zhu, Cheng
AU - Yang, Ning
AU - Zai, Huachao
AU - Wu, Yiliang
AU - Ma, Sai
AU - Bai, Yang
AU - Chen, Qi
AU - Xiao, Fei
AU - Sun, Kangwen
AU - Zhou, Huanping
N1 - Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2020/9/16
Y1 - 2020/9/16
N2 - Hybrid halide perovskite solar cells have found potential applications beyond terrestrial implementation due to their unique advantages in cold environments. Unfortunately, the pioneer exploits are limited in inferior device efficiency, while the operating mechanisms at low temperatures remain unclear. Here, we revealed substantial performance enhancement for (FA,MA,Cs)Pb(I,Br)3-based perovskite solar cells at temperatures from 290 to 180 K. Remarkably, the device obtained the highest efficiency of 25.2% (stabilized 24.2%) at 220 K, boosted from a certified efficiency of 23.3% (stabilized 22.8%) at 300 K. We proposed that the phase transition and lattice distortion in perovskite films during temperature cycling effectively activates the self-elimination of intrinsic defects, which contributes to the improved open-circuit voltage (1.153 to 1.229 V) and, thus, efficiency. In addition, the device without encapsulation was tested in the simulated near-space environment, demonstrating their operational feasibility and stability for practical low-temperature applications.
AB - Hybrid halide perovskite solar cells have found potential applications beyond terrestrial implementation due to their unique advantages in cold environments. Unfortunately, the pioneer exploits are limited in inferior device efficiency, while the operating mechanisms at low temperatures remain unclear. Here, we revealed substantial performance enhancement for (FA,MA,Cs)Pb(I,Br)3-based perovskite solar cells at temperatures from 290 to 180 K. Remarkably, the device obtained the highest efficiency of 25.2% (stabilized 24.2%) at 220 K, boosted from a certified efficiency of 23.3% (stabilized 22.8%) at 300 K. We proposed that the phase transition and lattice distortion in perovskite films during temperature cycling effectively activates the self-elimination of intrinsic defects, which contributes to the improved open-circuit voltage (1.153 to 1.229 V) and, thus, efficiency. In addition, the device without encapsulation was tested in the simulated near-space environment, demonstrating their operational feasibility and stability for practical low-temperature applications.
KW - aerospace
KW - defect
KW - low temperature
KW - open-circuit voltage
KW - perovskite solar cell
KW - phase transition
KW - self-elimination
UR - http://www.scopus.com/inward/record.url?scp=85089367664&partnerID=8YFLogxK
U2 - 10.1016/j.joule.2020.07.006
DO - 10.1016/j.joule.2020.07.006
M3 - Article
AN - SCOPUS:85089367664
SN - 2542-4351
VL - 4
SP - 1961
EP - 1976
JO - Joule
JF - Joule
IS - 9
ER -