期刊
ACS APPLIED ENERGY MATERIALS
卷 5, 期 3, 页码 3392-3400出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c03997
关键词
triple passivation; perovskite lamination; high e ffi ciency; UV stability; ambient stability
资金
- DST, India [DST/TSG/PT/2009/23, DST/CRG/2019/002164]
- Deity, India [5 (9) /2012-NANO (Vol. II)]
- Max-Planck-Gesellschaft [IGSTC/MPG/PG (PKI) /2011A/48]
- MHRD, India [SPARC/2018-2019/P1097/SL]
By using an advanced triple passivation technique with UV-absorbing BP molecules, the stability of perovskite solar cells is significantly improved, leading to a high power conversion efficiency and enhanced carrier transport. This approach effectively shields the perovskite layer from UV irradiation and moisture, demonstrating impressive UV and ambient stability.
The instability of the perovskite solar cells (PSCs) toward ultraviolet (UV) irradiation and moisture is a limiting factor in terms of commercialization even after achieving excellent power conversion efficiencies (PCEs). Herein, an advanced triple passivation technique has been strategically designed and demonstrated utilizing UV-absorbing 2-benzoylpyridine (BP) molecules as a passivation additive to laminate perovskites and improve PSC stability. Double layers of BP were coated on both sides of the perovskite layer, and the molecule was also incorporated into the precursor solution. This strategy significantly improved the perovskite crystallinity and film quality, lowered the recombination, and enhanced the carrier transport in the PSC. The triple-passivated device exhibited a high PCE of 20.46% with almost negligible hysteresis. Further, passivated large-area (2.5 cm2) devices were also fabricated that demonstrated a PCE of 18.61%. Moreover, the triple passivation approach exhibited impressive UV and ambient stability because it can effectively shield the perovskite layer from UV illumination and moisture.
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