Details

Autor(en) / Beteiligte

• Wang, Bin
• Ma, Junjie
• Li, Zehua
• Chen, Gangshu
• Gu, Qiang
• Chen, Shuyao
• Zhang, Yiqiang
• Song, Yanlin
• Chen, Jingbo
• Pi, Xiaodong
• Yu, Xuegong
• Yang, Deren

Titel

Bioinspired molecules design for bilateral synergistic passivation in buried interfaces of planar perovskite solar cells

Ist Teil von

• Nano research, 2022-02, Vol.15 (2), p.1069-1078

Ort / Verlag

Beijing: Tsinghua University Press

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Trap-mediated energy loss in the buried interface with non-exposed feature constitutes one of the serious challenges for achieving high-performance perovskite solar cells (PSCs). Inspired by the adhesion mechanism of mussels, herein, three catechol derivatives with functional Lewis base groups, namely 3,4-Dihydroxyphenylalanine (DOPA), 3,4-Dihydroxyphenethylamine (DA) and 3-(3,4-Dihydroxyphenyl) propionic acid (DPPA), were strategically designed. These molecules as interfacial linkers are incorporated into the buried interface between perovskite and SnO 2 surface, achieving bilateral synergetic passivation effect. The crosslinking can produce secondary bonding with the undercoordinated Pb 2+ and Sn 4+ exhibited the best performance and operational stability. Upon the DOPA passivation, a stabilized power conversion efficiency (PCE) of 21.5% was demonstrated for the planar PSCs. After 55 days of room-temperature storage, the unencapsulated devices with the DOPA crosslinker could still maintain 85% of their initial performance in air under relative humidity of ≈15%. This work opens up a new strategy for passivating the buried interfaces of perovskite photovoltaics and also provides important insights into designing defect passivation agents for other perovskite optoelectronic devices, such as light-emitting diodes, photodetectors, and lasers.