Terpyridine-zinc(<scp>ii</scp>) coordination nanosheets as modulators of perovskite crystallization to enhance solar cell efficiency
Terpyridine-zinc(<scp>ii</scp>) coordination nanosheets as modulators of perovskite crystallization to enhance solar cell efficiency
复制标题
三联吡啶-锌(<scp>ii</scp>)配位纳米片作为钙钛矿结晶调节剂以提高太阳能电池效率
DOI：
10.1039/d3ta00505d
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发表时间：
2023
影响因子：
11.9
通讯作者：
Nishihara Hiroshi
中科院分区：
文献类型：
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作者：
Wang Ying-Chiao;Chiang Chun-Hao;Su Chun-Jen;Chang Je-Wei;Lin Chi-Ying;Wei Chia-Chun;Huang Shao-Ku;Maeda Hiroaki;Jian Wen-Bin;Jeng U-Ser;Tsukagoshi Kazuhito;Chen Chun-Wei;Nishihara Hiroshi
高效率的钙钛矿-钙钛矿转换是提高钙钛矿太阳能电池（PSC）性能的核心因素之一。在此，我们报告了一种液/液界面合成三联吡啶-锌（II）（ZnTPY）配位纳米片（CONASHS），它可以增强PbI 2基钙钛矿结晶，从而提高PSC的效率。超声破碎ZnTPY CONASHS，富含不协调的三联吡啶部分，引起多齿螯合PbI 2，导致分散良好的ZnTPY：PbI 2复合物。这种金属有机络合物可以作为异质成核晶种，并促进在钙钛矿的前体溶液中形成PbI 2-to-[PbI 6 −x]4−配位的八面体骨架，从而降低四氢CH 3 NH3 PbI 3钙钛矿的结晶势垒，并实现完全的钙钛矿-钙钛矿转化。因此，ZnTPY覆盖的钙钛矿晶体具有长的光致发光（PL）寿命，这归因于与ZnTPY相关的更钝化的陷阱态。相应的PSC表现出最佳的功率转换效率为19.8%相比，17.9%的控制设备。结果证明，PSC族的性能可以通过将PbI 2分散在具有CONASH的溶液中以增强PbI 2向钙钛矿的转化来改善。
The high efficiency of precursor-to-perovskite conversion is one of the core factors in boosting the performance of perovskite solar cells (PSCs). Herein, we report a liquid/liquid interfacial synthesis of terpyridine-zinc(II) (ZnTPY) coordination nanosheets (CONASHs), which can enhance PbI2-based perovskite crystallization and thus the efficiency of PSCs. Ultrasonically fragmented ZnTPY CONASHs, rich in uncoordinated terpyridine moieties, caused multidentate chelation with PbI2, resulting in a well-dispersed ZnTPY:PbI2 complex. This metal-organic complex could act as a heterogeneous nucleation seed and facilitate the formation of a PbI2-to-[PbI6−x]4− coordinated octahedral framework in a precursor solution of perovskite, thereby reducing the crystallization barrier of tetragonal CH3NH3PbI3 perovskites and achieving a complete precursor-to-perovskite conversion. Consequently, ZnTPY-capped perovskite crystals had a long photoluminescence (PL) lifetime, which is attributed to the more passivated trap states associated with ZnTPY. The corresponding PSCs exhibited an optimal power conversion efficiency of 19.8% compared with 17.9% of the controlled device. The results prove that the performance of PSC families can be improved by dispersing PbI2 in a solution with CONASHs for enhancing the PbI2-to-perovskite conversion.