TY - JOUR
T1 - A Self-Assembled 3D/0D Quasi-Core–Shell Structure as Internal Encapsulation Layer for Stable and Efficient FAPbI3 Perovskite Solar Cells and Modules
AU - Wang, Yuqi
AU - Yang, Chao
AU - Wang, Zhen
AU - Li, Gu
AU - Yang, Zhengchi
AU - Wen, Xinyang
AU - Hu, Xiaowen
AU - Jiang, Yue
AU - Feng, Shien-Ping
AU - Chen, Yiwang
AU - Zhou, Guofu
AU - Liu, Jun-Ming
AU - Gao, Jinwei
PY - 2024/4/4
Y1 - 2024/4/4
N2 - FAPbI3 perovskites have garnered considerable interest owing to their outstanding thermal stability, along with near-theoretical bandgap and efficiency. However, their inherent phase instability presents a substantial challenge to the long-term stability of devices. Herein, this issue through a dual-strategy of self-assembly 3D/0D quasi-core–shell structure is tackled as an internal encapsulation layer, and in situ introduction of excess PbI2 for surface and grain boundary defects passivating, therefore preventing moisture intrusion into FAPbI3 perovskite films. By utilizing this method alone, not only enhances the stability of the FAPbI3 film but also effectively passivates defects and minimizes non-radiative recombination, ultimately yielding a champion device efficiency of 23.23%. Furthermore, the devices own better moisture resistance, exhibiting a T80 lifetime exceeding 3500 h at 40% relative humidity (RH). Meanwhile, a 19.51% PCE of mini-module (5 × 5 cm2) is demonstrated. This research offers valuable insights and directions for the advancement of stable and highly efficient FAPbI3 perovskite solar cells. © 2023 Wiley-VCH GmbH.
AB - FAPbI3 perovskites have garnered considerable interest owing to their outstanding thermal stability, along with near-theoretical bandgap and efficiency. However, their inherent phase instability presents a substantial challenge to the long-term stability of devices. Herein, this issue through a dual-strategy of self-assembly 3D/0D quasi-core–shell structure is tackled as an internal encapsulation layer, and in situ introduction of excess PbI2 for surface and grain boundary defects passivating, therefore preventing moisture intrusion into FAPbI3 perovskite films. By utilizing this method alone, not only enhances the stability of the FAPbI3 film but also effectively passivates defects and minimizes non-radiative recombination, ultimately yielding a champion device efficiency of 23.23%. Furthermore, the devices own better moisture resistance, exhibiting a T80 lifetime exceeding 3500 h at 40% relative humidity (RH). Meanwhile, a 19.51% PCE of mini-module (5 × 5 cm2) is demonstrated. This research offers valuable insights and directions for the advancement of stable and highly efficient FAPbI3 perovskite solar cells. © 2023 Wiley-VCH GmbH.
KW - 3D/0D quasi-core-shell
KW - CsPbBr3 quantum dots
KW - in situ passivation
KW - perovskite solar cells
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85177163446&origin=recordpage
U2 - 10.1002/smll.202306954
DO - 10.1002/smll.202306954
M3 - RGC 21 - Publication in refereed journal
SN - 1613-6810
VL - 20
JO - Small
JF - Small
IS - 14
M1 - 2306954
ER -