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High‐Performance Perovskite Solar Cells Using Iodine as Effective Dopant for Spiro‐OMeTAD
Energy Technology ( IF 3.6 ) Pub Date : 2020-01-30 , DOI: 10.1002/ente.201901171 Pengqiang Yuan 1 , Jihuai Wu 1 , Weihai Sun 1 , Qianjin Zhu 1 , Mingjing Zhang 1 , Jinjun Zou 1 , Xiaobing Wang 1 , Xuping Liu 1 , Yuqian Yang 1 , Zhang Lan 1
Energy Technology ( IF 3.6 ) Pub Date : 2020-01-30 , DOI: 10.1002/ente.201901171 Pengqiang Yuan 1 , Jihuai Wu 1 , Weihai Sun 1 , Qianjin Zhu 1 , Mingjing Zhang 1 , Jinjun Zou 1 , Xiaobing Wang 1 , Xuping Liu 1 , Yuqian Yang 1 , Zhang Lan 1
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The p‐type dopant of spiro‐OMeTAD has been identified as a rational strategy for the enhancement of the hole transport ability in perovskite solar cells (PSCs). Herein, to enhance the conductivity and hole‐extraction ability of spiro‐OMeTAD, a low‐cost and facile method is developed by introducing iodine into the hole transport materials. Morphology observation, energy gap characterization, and photoelectrochemical measurements indicate that as a mild Lewis acid, oxidant, and p‐type dopant, iodine moderately oxidizes spiro‐OMeTAD, optimizes the energy match with perovskite, mitigates the trap state density, interface resistance, and carrier recombination, and improves the hole‐extraction ability and carrier transport capacity. Consequently, a planar PSC based on the spiro‐OMeTAD doped with 8 wt% iodine achieves a champion power conversion efficiency (PCE) of 19.69%. Conversely, the device with pristine spiro‐OMeTAD gets an efficiency of 18.04%. This work indicates a potential application of iodine as a promising p‐type dopant for spiro‐OMeTAD in PSCs.
中文翻译：
使用碘作为Spiro-OMeTAD的有效掺杂剂的高性能钙钛矿太阳能电池
螺-OMeTAD的p型掺杂物已被认为是增强钙钛矿太阳能电池（PSC）空穴传输能力的合理策略。在本文中，为了增强螺-OMeTAD的电导率和空穴提取能力，通过将碘引入空穴传输材料中，开发了一种低成本且简便的方法。形态学观察，能隙表征和光电化学测量表明，碘是一种温和的路易斯酸，氧化剂和p型掺杂剂，碘可中等程度地氧化螺-OMeTAD，优化与钙钛矿的能量匹配，减轻陷阱能级密度，界面电阻和载流子重组，提高了空穴提取能力和载流子传输能力。所以，基于掺有8 wt％碘的spiro-OMeTAD的平面PSC可实现19.69％的最佳功率转换效率（PCE）。相反，带有原始spiro-OMeTAD的设备的效率为18.04％。这项工作表明碘作为潜在的p型掺杂剂可用于PSC中的螺-OMeTAD。
更新日期：2020-01-30
中文翻译：
使用碘作为Spiro-OMeTAD的有效掺杂剂的高性能钙钛矿太阳能电池
螺-OMeTAD的p型掺杂物已被认为是增强钙钛矿太阳能电池（PSC）空穴传输能力的合理策略。在本文中，为了增强螺-OMeTAD的电导率和空穴提取能力，通过将碘引入空穴传输材料中，开发了一种低成本且简便的方法。形态学观察，能隙表征和光电化学测量表明，碘是一种温和的路易斯酸，氧化剂和p型掺杂剂，碘可中等程度地氧化螺-OMeTAD，优化与钙钛矿的能量匹配，减轻陷阱能级密度，界面电阻和载流子重组，提高了空穴提取能力和载流子传输能力。所以，基于掺有8 wt％碘的spiro-OMeTAD的平面PSC可实现19.69％的最佳功率转换效率（PCE）。相反，带有原始spiro-OMeTAD的设备的效率为18.04％。这项工作表明碘作为潜在的p型掺杂剂可用于PSC中的螺-OMeTAD。
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