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Enhancing Efficiency of Perovskite Solar Cells via Surface Passivation with Graphene Oxide Interlayer
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-10-30 00:00:00 , DOI: 10.1021/acsami.7b10773 Hao Li 1 , Leiming Tao 1 , Feihong Huang 1 , Qiang Sun 1 , Xiaojuan Zhao 1 , Junbo Han 1 , Yan Shen 1 , Mingkui Wang 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-10-30 00:00:00 , DOI: 10.1021/acsami.7b10773 Hao Li 1 , Leiming Tao 1 , Feihong Huang 1 , Qiang Sun 1 , Xiaojuan Zhao 1 , Junbo Han 1 , Yan Shen 1 , Mingkui Wang 1
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Perovskite solar cells have been demonstrated as promising low-cost and highly efficient next-generation solar cells. Enhancing VOC by minimization the interfacial recombination kinetics can further improve device performance. In this work, we for the first time reported on surface passivation of perovskite layers with chemical modified graphene oxides, which act as efficient interlayer to reduce interfacial recombination and enhance hole extraction as well. Our modeling points out that the passivation effect mainly comes from the interaction between functional group (4-fluorophenyl) and under-coordinated Pb ions. The resulting perovskite solar cells achieved high efficient power conversion efficiency of 18.75% with enhanced high open circuit VOC of 1.11 V. Ultrafast spectroscopy, photovoltage/photocurrent transient decay, and electronic impedance spectroscopy characterizations reveal the effective passivation effect and the energy loss mechanism. This work sheds light on the importance of interfacial engineering on the surface of perovskite layers and provides possible ways to improve device efficiency.
中文翻译：
通过氧化石墨烯中间层的表面钝化提高钙钛矿太阳能电池的效率
钙钛矿太阳能电池已被证明是有前途的低成本和高效的下一代太阳能电池。通过最小化界面重组动力学来提高V OC可以进一步改善器件性能。在这项工作中，我们首次报道了钙钛矿层表面化学改性的氧化石墨烯的表面钝化作用，该氧化石墨烯作为有效的中间层，可减少界面复合并增强空穴提取。我们的模型指出钝化效果主要来自官能团（4-氟苯基）与配位不足的Pb离子之间的相互作用。所得的钙钛矿太阳能电池通过增强的高开路V OC达到了18.75％的高效功率转换效率1.11 V的超快光谱，光电压/光电流瞬态衰减和电子阻抗谱表征揭示了有效的钝化效应和能量损失机理。这项工作揭示了钙钛矿层表面上界面工程的重要性，并提供了提高器件效率的可能方法。
更新日期：2017-10-31
中文翻译：
通过氧化石墨烯中间层的表面钝化提高钙钛矿太阳能电池的效率
钙钛矿太阳能电池已被证明是有前途的低成本和高效的下一代太阳能电池。通过最小化界面重组动力学来提高V OC可以进一步改善器件性能。在这项工作中，我们首次报道了钙钛矿层表面化学改性的氧化石墨烯的表面钝化作用，该氧化石墨烯作为有效的中间层，可减少界面复合并增强空穴提取。我们的模型指出钝化效果主要来自官能团（4-氟苯基）与配位不足的Pb离子之间的相互作用。所得的钙钛矿太阳能电池通过增强的高开路V OC达到了18.75％的高效功率转换效率1.11 V的超快光谱，光电压/光电流瞬态衰减和电子阻抗谱表征揭示了有效的钝化效应和能量损失机理。这项工作揭示了钙钛矿层表面上界面工程的重要性，并提供了提高器件效率的可能方法。
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