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Diammonium-Cesium Lead Halide Perovskite with Phase-Segregated Interpenetrating Morphology for Photovoltaics.
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-01-16 , DOI: 10.1021/acs.jpclett.9b03414 Ziren Zhou 1 , Shuang Yang 1 , Kaixuan Xu 2, 3 , Hong Wei Qiao 1 , Jin Xie 1 , Zeqing Lin 1 , Bing Ge 1 , Jingjing He 1 , Mengjiong Chen 1 , Jun Zhang 2, 3, 4 , Yu Hou 1 , Hua Gui Yang 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-01-16 , DOI: 10.1021/acs.jpclett.9b03414 Ziren Zhou 1 , Shuang Yang 1 , Kaixuan Xu 2, 3 , Hong Wei Qiao 1 , Jin Xie 1 , Zeqing Lin 1 , Bing Ge 1 , Jingjing He 1 , Mengjiong Chen 1 , Jun Zhang 2, 3, 4 , Yu Hou 1 , Hua Gui Yang 1
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The insertion of organic spacers into halide perovskite slabs has offered a trade-off between the efficiency and stability of perovskite solar cells (PSCs). The layered structure of diammonium-intercalated cesium lead halide perovskites is virtually unexplored, in contrast to several works on the monoammonium system. In this report, we find that perovskite with 1,4-butanediammonium (BDA) and cesium cations can only form n = 1 and n = 2 layered isologues defined by the chemical formula of (BDA)Csn-1Pbn(I0.7Br0.3)3n+1, while the n = 3-4 ones will self-construct into unique heterostructures comprising separated quantum wells (QWs; n = 1-2) and 3D (n = ∞) perovskites. We highlight that the 2D/3D heterostructures show a structural resemblance to that of bulk heterojunction in organics, thus improving the charge separation and transport more than surface passivation. Solar cells based on the (BDA)Cs3Pb4I9.1Br3.9 (n = 4) absorbing layer delivered a power conversion efficiency (PCE) reaching 9.49% with ideal light and thermal stability.
中文翻译：
光伏相中具有相分离互穿形态的二铵铯卤化钙钛矿。
将有机间隔物插入卤化物钙钛矿板中可以在钙钛矿太阳能电池（PSC）的效率和稳定性之间进行权衡。与单铵体系的几项研究相反，嵌入二铵的卤化铯铅钙钛矿的层状结构实际上尚未开发。在本报告中，我们发现具有1,4-丁二铵（BDA）和铯阳离子的钙钛矿只能形成n = 1和n = 2的层状同系物，由（BDA）Csn-1Pbn（I0.7Br0.3）的化学式定义）3n + 1，而n = 3-4个将自构为包含分离的量子阱（QWs; n = 1-2）和3D（n =∞）钙钛矿的独特异质结构。我们着重指出2D / 3D异质结构与有机物中的本体异质结的结构相似，因此，与表面钝化相比，电荷分离和传输的改善更大。基于（BDA）Cs3Pb4I9.1Br3.9（n = 4）吸收层的太阳能电池的功率转换效率（PCE）达到9.49％，具有理想的光和热稳定性。
更新日期：2020-01-17
中文翻译：
光伏相中具有相分离互穿形态的二铵铯卤化钙钛矿。
将有机间隔物插入卤化物钙钛矿板中可以在钙钛矿太阳能电池（PSC）的效率和稳定性之间进行权衡。与单铵体系的几项研究相反，嵌入二铵的卤化铯铅钙钛矿的层状结构实际上尚未开发。在本报告中，我们发现具有1,4-丁二铵（BDA）和铯阳离子的钙钛矿只能形成n = 1和n = 2的层状同系物，由（BDA）Csn-1Pbn（I0.7Br0.3）的化学式定义）3n + 1，而n = 3-4个将自构为包含分离的量子阱（QWs; n = 1-2）和3D（n =∞）钙钛矿的独特异质结构。我们着重指出2D / 3D异质结构与有机物中的本体异质结的结构相似，因此，与表面钝化相比，电荷分离和传输的改善更大。基于（BDA）Cs3Pb4I9.1Br3.9（n = 4）吸收层的太阳能电池的功率转换效率（PCE）达到9.49％，具有理想的光和热稳定性。
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