Straight Manipulation Annealing in a Solvent Atmosphere for Quality-Improved Cs₂AgBiBr₆ Perovskites

Abstract

As a new-generation photoelectric material, perovskites have attracted researchers' attention due to their excellent optoelectronic properties. However, the existence of defects inevitably causes structural degradation and restricts their performance, which need to be further improved by post-treatment. At present, post-treatments mostly focus on non-contact treatments, which may constrain the effect since the influence on the perovskites caused by the direct contact is much more straightly. Therefore, we proposed an annealing strategy of straight manipulation in a solvent atmosphere with the assistance of polyimide (PI) tape for the perovskite post-treatment, due to the high heat resistance and less glue residual of this tape. It casts an influence on the perovskite directly, proving the possibility of the straight manipulation by operators, promoting the recrystallization of the perovskite grains and removing the impurity substance. The optimized Pb-free perovskite film exhibits a better X-ray sensitivity of 7.5 × 10 4 μC Gy air −1 cm −2 and a great detection limit of 47 nGy air s −1 , which is comparable to advanced Pb-based perovskite X-ray detectors and all commercial ones. The new annealing strategy provides a facile, effective, and simple method to improve the perovskite quality, exhibiting the potential and harmlessness of the direct contact post-treatment, which paves the way for a broader application of perovskites.

Empowering Indoor Photovoltaics: Stable Lead‐Free Perovskites and Beyond

“…These materials exhibit compelling photophysics properties and the potential for achieving high‐performance indoor energy generation. [ 6,13–16 ] Pb‐free halide perovskites (LFHPs), chalcogen perovskites, and other related families have demonstrated remarkable performance in applications like X‐rays, [ 17 ] photocatalysis, [ 18 ] light emitting diode (LEDs), [ 19 ] photodetectors, [ 20 ] outdoor solar cells (ODSCs), [ 21,22 ] and most recently, in IPVs. [ 11 ] Their strong light absorption and efficient charge carrier generation contribute to impressive energy conversion efficiencies even under low‐light conditions.…”

Multi-band response Cs₂AgBiBr₆ double perovskite photodetector based on TiO₂ nanopillars

“…因此, 在TiO 2 上的生长的钙 钛矿薄膜具有更好的覆盖性以及更优的薄膜质 量 [25] . Yuan等 [26] 大量研究表明半导体纳米棒或纳米柱阵列可 以减少光反射损耗, 抑制激子复合动力学, 提高光 电器件的电荷输运效率 [27][28][29] 组成Cs 2 AgBiBr 6 薄膜的晶粒较大, 晶粒尺寸大多 分布在200 -400 nm的范围之内, 有部分晶粒的 尺寸可达900 nm左右, 且与Xiao等 [30] 以及Qin等 [31] 报道的不同, 成膜表面并未观察到明显的针孔与杂 002), ( 022), ( 222), ( 004), ( 024), ( 224)和(044) 晶面, 这与SLavney等 [32] 输层的接触面积, 减小载流子的传输距离 [35] .…”