Details

Autor(en) / Beteiligte

• Kanda, Hiroyuki
• Shibayama, Naoyuki
• Huckaba, Aron Joel
• Lee, Yonghui
• Paek, Sanghyun
• Klipfel, Nadja
• Roldán-Carmona, Cristina
• Queloz, Valentin Ianis Emmanuel
• Grancini, Giulia
• Zhang, Yi
• Abuhelaiqa, Mousa
• Cho, Kyung Taek
• Li, Mo
• Mensi, Mounir Driss
• Kinge, Sachin
• Nazeeruddin, Mohammad Khaja

Titel

Band-bending induced passivation: high performance and stable perovskite solar cells using a perhydropoly(silazane) precursor

Ist Teil von

• Energy & environmental science, 2020-04, Vol.13 (4), p.1222-123

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Surface passivation of the perovskite photo absorber is a key factor to improve the photovoltaic performance. So far robust passivation strategies have not yet been revealed. Here, we demonstrate a successful passivation strategy which controls the Fermi-level of the perovskite surface by improving the surface states. Such Fermi-level control caused band-bending between the surface and bulk of the perovskite, which enhanced the hole-extraction from the absorber bulk to the HTM side. As an added benefit, the inorganic passivation layer improved the device light stability. By depositing a thick protection layer on the complete device, a remarkable waterproofing effect was obtained. As a result, an enhancement of V OC and the conversion efficiency from 20.5% to 22.1% was achieved. We revealed these passivation mechanisms and used perhydropoly(silazane) (PHPS) derived silica to control the perovskite surface states. It could successfully control the band-bending of the perovskite semiconductor, which led to improvement of the photovoltaic performance.