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首页> 外文期刊>Organic Electronics >Boosting the efficiency of quasi two-dimensional perovskite solar cells via an interfacial layer of metallic nanoparticles
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Boosting the efficiency of quasi two-dimensional perovskite solar cells via an interfacial layer of metallic nanoparticles

机译：通过金属纳米粒子的界面层提高准二维钙钛矿太阳能电池的效率

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摘要

Quasi two-dimensional (Quasi-2D) layered perovskites show higher stability with respect to three-dimensional (3D) perovskites. And compared with two-dimensional (2D) perovskites, quasi-2D perovskites exhibit an improvement in power conversion efficiency (PCE) of perovskite solar cells (PSCs) due to reduced exciton binding energy. So far, different strategies have been adopted to increase PCEs of the quasi-2D PSCs by forming high crystalline quasi-2D perovskite films. In this work, we show that the performance of the quasi-2D aromatic phenylethylammonium based PSCs can be improved greatly through interfacial engineering, i.e., by introducing a layer of SiO2 coated AuAg-alloyed nanoprisms (AuAgNPrisms@SiO2) before coating the active layer. As a result, the short circuit current density and PCE increased by 32.8% and 34.1%, respectively. Morphological studies show that the incorporated AuAgNPrism@SiO2 particles can serve as inducers for forming highly smooth quasi-2D perovskite film. Comprehensive studies indicate that AuAgNPrisms@SiO2 can also reduce the series resistance, increase light absorption, induce the photon recycling scheme, and assist exciton dissociation at the interface. The combination of all these helpful effects contributes to the observed PCE improvement of quasi-2D PSCs. Our results provide novel insight into the effect of metallic nanoparticles on the quasi-2D perovskite film and on the performance of quasi-2D PSCs.
机译：准二维（Quasi-2D）层状钙钛矿相对于三维（3D）钙钛矿显示出更高的稳定性。并且与二维（2D）钙钛矿相比，准2D钙钛矿由于减少了激子结合能，因此钙钛矿太阳能电池（PSC）的功率转换效率（PCE）有所提高。迄今为止，已经采用了不同的策略来通过形成高结晶准2D钙钛矿膜来增加准2D PSC的PCE。在这项工作中，我们表明通过界面工程可以大大改善准2D芳族苯基乙基铵基PSC的性能，即在涂覆活性层之前引入一层SiO2涂覆的AuAg合金纳米棱镜（AuAgNPrisms @ SiO2）层。结果，短路电流密度和PCE分别增加了32.8％和34.1％。形态学研究表明，掺入的AuAgNPrism @ SiO2颗粒可作为形成高度光滑的准2D钙钛矿膜的诱导剂。全面的研究表明，AuAgNPrisms @ SiO2还可以降低串联电阻，增加光吸收，诱导光子再循环方案并帮助界面处的激子解离。所有这些有益作用的结合有助于观察到准2D PSC的PCE改善。我们的结果为金属纳米粒子对准2D钙钛矿薄膜的影响以及对准2D PSC的性能提供了新颖的见解。

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