王照奎教授、王凯礼副研究员及其合作者在adv. mater.上发表论文-尊龙凯时

作者：

xiao-ying he¹, bin song¹, kai-li wang¹*, nan li¹, lei huang¹, rui-hao qin¹, jing chen¹, chun-hao chen¹, yu xia¹, ilhan yavuz², yan-hui lou¹* and zhao-kui wang¹*

单位：

¹state key laboratory of bioinspired interfacial materials science, institute of functional nano & soft materials (funsom), soochow university, suzhou 215123, china.

²department of physics, marmara university, ziverbey 34722, türkiye.

摘要：

light-induced halide segregation presents a fundamental barrier to the longevity of wide-bandgap (wbg) mixed-halide perovskites. herein, a multifunctional ionic polymer, polyquaternium-37, is reported as an effective grain boundary passivator to inhibit the degradation pathway. this dual-interaction mechanism concertedly arrests halide migration at grain boundaries, thereby suppressing local electric-field and ultimately curbing light-induced phase separation. consequently, the modified wbg perovskites demonstrate robust photostability under light stress. the champion inverted perovskite photovoltaic device delivers a power conversion efficiency (pce) of 22.86% under am 1.5g illumination and an outstanding indoor pce of 43.19% under 1000 lux. remarkably, the modified device exhibits a projected t₉₀ lifetime exceeding 10 000 h under continuous indoor light cycling. this work pioneers a facile solution to halide segregation via grain boundary engineering, paving the way for operationally stable wbg perovskite photovoltaics.

影响因子：

27.4

分区情况：

一区

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