TY - JOUR
T1 - Interfacial Modification through a Multifunctional Molecule for Inorganic Perovskite Solar Cells with over 18% Efficiency
AU - Liu, Tiantian
AU - Zhang, Jie
AU - Wu, Xin
AU - Liu, Hongbin
AU - Li, Fengzhu
AU - Deng, Xiang
AU - Lin, Francis
AU - Li, Xiaosong
AU - Zhu, Zonglong
AU - Jen, Alex K.-Y.
PY - 2020/9
Y1 - 2020/9
N2 - A highly effective interface engineering approach uses a multifunctional molecule, 5‐amino‐2,4,6‐triiodoisophthalic acid (ATPA), to anchor on TiO2 and CsPbI3 simultaneously by reacting with dangling hydroxyl groups on TiO2 surfaces and passivating the defects of CsPbI3 films. In addition, the introduction of ATPA results in cascade energy‐level alignment between the perovskite and TiO2 electron‐transporting layer (ETL) to improve the electron extraction property. Based on the ATPA‐modified TiO2 substrates, optimized CsPbI3 perovskite solar cells (PVSCs) deliver the highest power conversion efficiency (PCE) of over 18% with suppressed hysteresis. Moreover, the unencapsulated TiO2/ATPA‐based devices exhibit much better long‐term stability and photostability than the only TiO2‐based devices.
AB - A highly effective interface engineering approach uses a multifunctional molecule, 5‐amino‐2,4,6‐triiodoisophthalic acid (ATPA), to anchor on TiO2 and CsPbI3 simultaneously by reacting with dangling hydroxyl groups on TiO2 surfaces and passivating the defects of CsPbI3 films. In addition, the introduction of ATPA results in cascade energy‐level alignment between the perovskite and TiO2 electron‐transporting layer (ETL) to improve the electron extraction property. Based on the ATPA‐modified TiO2 substrates, optimized CsPbI3 perovskite solar cells (PVSCs) deliver the highest power conversion efficiency (PCE) of over 18% with suppressed hysteresis. Moreover, the unencapsulated TiO2/ATPA‐based devices exhibit much better long‐term stability and photostability than the only TiO2‐based devices.
KW - defects passivation
KW - energy-level alignment
KW - inorganic perovskite solar cells
KW - interface engineering
KW - multifunctional molecules
UR - http://www.scopus.com/inward/record.url?scp=85085971743&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85085971743&origin=recordpage
U2 - 10.1002/solr.202000205
DO - 10.1002/solr.202000205
M3 - RGC 21 - Publication in refereed journal
SN - 2367-198X
VL - 4
JO - Solar RRL
JF - Solar RRL
IS - 9
M1 - 2000205
ER -
