TY - JOUR
T1 - Synchronous Passivation of Defects with Low Formation Energies via Terdentate Anchoring Enabling High Performance Perovskite Solar Cells with Efficiency over 24%
AU - Zhao, Wenhao
AU - Guo, Pengfei
AU - Su, Jie
AU - Fang, Zhiyu
AU - Jia, Ning
AU - Liu, Chen
AU - Ye, Linfeng
AU - Ye, Qian
AU - Chang, Jingjing
AU - Wang, Hongqiang
N1 - Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2022/6/10
Y1 - 2022/6/10
N2 - The ionic nature endows halide perovskites with intrinsic interfacial defects in the formed polycrystalline films, thus imposing the challenge of synchronously passivating these defects with low formation energies that directly account for the unsatisfied performance of perovskite solar cells (PSCs). By virtue of the theoretically proven capability of a three to four times enhancement of the formation energy of each defect of Pb-I antisite (PbI) and iodine vacancy (VI), a new passivation molecule of 1,10-phenanthrolin-5-amine (PAA) is intentionally explored to synchronously passivate the dual defects. The pronounced passivation effect is experimentally verified by the sharp enhancement of the open-circuit voltage in ternary PSCs from the original 1.118 up to 1.207 V, as well as the construction of PAA-modified formamidinium lead iodide PSCs with a champion efficiency up to 24.06%, thus providing a universal alternative of addressing interfacial charge carrier dynamics and operational stability of PSCs that are bothered by the multiple interfacial defects.
AB - The ionic nature endows halide perovskites with intrinsic interfacial defects in the formed polycrystalline films, thus imposing the challenge of synchronously passivating these defects with low formation energies that directly account for the unsatisfied performance of perovskite solar cells (PSCs). By virtue of the theoretically proven capability of a three to four times enhancement of the formation energy of each defect of Pb-I antisite (PbI) and iodine vacancy (VI), a new passivation molecule of 1,10-phenanthrolin-5-amine (PAA) is intentionally explored to synchronously passivate the dual defects. The pronounced passivation effect is experimentally verified by the sharp enhancement of the open-circuit voltage in ternary PSCs from the original 1.118 up to 1.207 V, as well as the construction of PAA-modified formamidinium lead iodide PSCs with a champion efficiency up to 24.06%, thus providing a universal alternative of addressing interfacial charge carrier dynamics and operational stability of PSCs that are bothered by the multiple interfacial defects.
KW - defects passivation
KW - low formation energy
KW - perovskite solar cells
KW - terdentate anchoring
UR - http://www.scopus.com/inward/record.url?scp=85125892467&partnerID=8YFLogxK
U2 - 10.1002/adfm.202200534
DO - 10.1002/adfm.202200534
M3 - 文章
AN - SCOPUS:85125892467
SN - 1616-301X
VL - 32
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 24
M1 - 2200534
ER -