Copper coordination polymers with selective hole conductivity
Copper coordination polymers with selective hole conductivity
复制标题
具有选择性空穴导电性的铜配位聚合物
DOI：
10.1039/d2ta00267a
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发表时间：
2022
影响因子：
11.9
通讯作者：
Michaels H
中科院分区：
文献类型：
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作者：
Michaels H
新兴的太阳能技术将在使全世界社会能够克服目前的能源挑战和实现碳净零方面发挥关键作用。低效率和不稳定的电荷传输材料限制了当前新兴的能量转换和存储技术。低维配位聚合物代表了一种替代的，前所未有的一类电荷传输材料，由分子结构单元组成。在这里，我们提供了一个全面的研究混合价的配位聚合物从分析的电荷传输机制，以实现空穴导电层。二硫代氨基甲酸铜配合物提供由（CuI2X2）卤化铜菱连接的一维聚合物链的形态控制。协调一致的理论和实验的努力确定了在过渡到带状运输与建模的有效空穴质量为6me的电荷传输机制。碘桥联配位聚合物在室温下表现出1 mS cm−1的优异电导率和5.8 × 10−4 cm 2（V s）−1的空穴迁移率。利用卤化物钙钛矿薄膜的纳秒光致发光，研究了配位聚合物薄膜中的纳秒选择性空穴注入。配位聚合物构成重掺杂有机空穴导体的当前标准的可持续的、可调的替代物。
Emerging technologies in solar energy will be critical in enabling worldwide society in overcoming the present energy challenges and reaching carbon net zero. Inefficient and unstable charge transport materials limit the current emerging energy conversion and storage technologies. Low-dimensional coordination polymers represent an alternative, unprecedented class of charge transport materials, comprised of molecular building blocks. Here, we provide a comprehensive study of mixed-valence coordination polymers from an analysis of the charge transport mechanism to their implementation as hole-conducting layers. CuII dithiocarbamate complexes afford morphology control of 1D polymer chains linked by (CuI2X2) copper halide rhombi. Concerted theoretical and experimental efforts identified the charge transport mechanism in the transition to band-like transport with a modeled effective hole mass of 6me. The iodide-bridged coordination polymer showed an excellent conductivity of 1 mS cm−1 and a hole mobility of 5.8 10−4 cm2 (V s)−1 at room temperature. Nanosecond selective hole injection into coordination polymer thin films was captured by nanosecond photoluminescence of halide perovskite films. Coordination polymers constitute a sustainable, tunable alternative to the current standard of heavily doped organic hole conductors.