TY - JOUR
T1 - Visualizing the impact of light soaking on morphological domains in an operational cesium lead halide perovskite solar cell
AU - Vu, Thi-Hai-Yen
AU - Chen, Weijian
AU - Deng, Xiaofan
AU - Lau, Cho Fai Jonathan
AU - Huang, Shujuan
AU - Ho-Baillie, Anita
AU - Jia, Baohua
AU - Wen, Xiaoming
PY - 2020/1/2
Y1 - 2020/1/2
N2 - The dynamics of photogenerated carriers and mobile ions in operational cesium lead halide (CsPbI3) perovskite solar cells (PSCs) under working conditions are studied using nanoscale-resolved fluorescence lifetime imaging microscopy (FLIM). The temporally and spatially resolved photoluminescence (PL) changes in the perovskite film during and after bias light soaking are dynamically monitored. Through the analysis of the dynamic variations of PL intensity and PL lifetime of an open-circuit PSC, the impacts of light soaking are revealed by a dynamic model of photogenerated charge carrier and mobile ions. We confirmed the different behaviors between morphological domain interiors and domain boundaries during light soaking, which shed light on the engineering of the domain interiors in addition to the commonly considered domain boundary strategies. This work provides a full picture of the photogenerated process in an operational PSC and therefore guides the design and operation of perovskite-based optoelectronic devices.[Graphic presents]
AB - The dynamics of photogenerated carriers and mobile ions in operational cesium lead halide (CsPbI3) perovskite solar cells (PSCs) under working conditions are studied using nanoscale-resolved fluorescence lifetime imaging microscopy (FLIM). The temporally and spatially resolved photoluminescence (PL) changes in the perovskite film during and after bias light soaking are dynamically monitored. Through the analysis of the dynamic variations of PL intensity and PL lifetime of an open-circuit PSC, the impacts of light soaking are revealed by a dynamic model of photogenerated charge carrier and mobile ions. We confirmed the different behaviors between morphological domain interiors and domain boundaries during light soaking, which shed light on the engineering of the domain interiors in addition to the commonly considered domain boundary strategies. This work provides a full picture of the photogenerated process in an operational PSC and therefore guides the design and operation of perovskite-based optoelectronic devices.[Graphic presents]
UR - http://www.scopus.com/inward/record.url?scp=85077125469&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/DP190103186
UR - http://purl.org/au-research/grants/arc/DP190103284
U2 - 10.1021/acs.jpclett.9b03210
DO - 10.1021/acs.jpclett.9b03210
M3 - Article
C2 - 31829600
AN - SCOPUS:85077125469
SN - 1948-7185
VL - 11
SP - 136
EP - 143
JO - Journal of Physical Chemistry Letters
JF - Journal of Physical Chemistry Letters
IS - 1
ER -