Udalova Natalia N, Moskalenko Aleksandra K, Belich Nikolai A, Ivlev Pavel A, Tutantsev Andrey S, Goodilin Eugene A, Tarasov Alexey B
Laboratory of New Materials for Solar Energetics, Department of Materials Science, Lomonosov Moscow State University, Lenin Hills, 119991 Moscow, Russia.
Department of Chemistry, Lomonosov Moscow State University, Lenin Hills, 119991 Moscow, Russia.
Nanomaterials (Basel). 2022 Dec 7;12(24):4357. doi: 10.3390/nano12244357.
Organic diammonium cations are a promising component of both layered (2D) and conventional (3D) hybrid halide perovskites in terms of increasing the stability of perovskite solar cells (PSCs). We investigated the crystallization ability of phase-pure 2D perovskites based on 1,4-butanediammonium iodide (BDAI2) with the layer thicknesses n = 1, 2, 3 and, for the first time, revealed the presence of a persistent barrier to obtain BDA-based layered compounds with n > 1. Secondly, we introduced BDAI2 salt into 3D lead−iodide perovskites with different cation compositions and discovered a threshold-like nonmonotonic dependence of the perovskite microstructure, optoelectronic properties, and device performance on the amount of diammonium additive. The value of the threshold amount of BDAI2 was found to be ≤1%, below which bulk passivation plays the positive effect on charge carrier lifetimes, fraction of radiative recombination, and PSCs power conversion efficiencies (PCE). In contrast, the presence of any amount of diammonium salt leads to the sufficient enhancement of the photothermal stability of perovskite materials and devices, compared to the reference samples. The performance of all the passivated devices remained within the range of 50 to 80% of the initial PCE after 400 h of continuous 1 sun irradiation with a stabilized temperature of 65 °C, while the performance of the control devices deteriorated after 170 h of the experiment.
就提高钙钛矿太阳能电池（PSC）的稳定性而言，有机二铵阳离子是层状（二维）和传统（三维）混合卤化物钙钛矿的一个有前景的组成部分。我们研究了基于碘化1,4 - 丁二铵（BDAI2）且层厚度n = 1、2、3的纯相二维钙钛矿的结晶能力，并首次揭示了存在一个持续的障碍，以获得n > 1的基于BDA的层状化合物。其次，我们将BDAI2盐引入具有不同阳离子组成的三维碘化铅钙钛矿中，发现钙钛矿微观结构、光电性质和器件性能对二铵添加剂用量呈现出类似阈值的非单调依赖性。发现BDAI2的阈值量值≤1%，低于该值时，体钝化对电荷载流子寿命、辐射复合分数和PSC功率转换效率（PCE）具有积极影响。相比之下，与参考样品相比，任何量的二铵盐的存在都会导致钙钛矿材料和器件的光热稳定性有足够的提高。在65°C稳定温度下连续1个太阳光照400小时后，所有钝化器件的性能保持在初始PCE的50%至80%范围内，而对照器件在实验170小时后性能恶化。
