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Lanthanide Stabilized All-Inorganic CsPbI2Br Perovskite Solar Cells with Superior Thermal Resistance
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-03-31 , DOI: 10.1021/acsaem.1c00311
Libao Chen 1 , Wen Wu 1 , Jinpei Wang 1 , Zongyao Qian 1 , Ruigang Liu 1 , Yangyang Niu 1 , Yonghua Chen 1 , Xiaoji Xie 1 , Hui Zhang 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-03-31 , DOI: 10.1021/acsaem.1c00311
Libao Chen 1 , Wen Wu 1 , Jinpei Wang 1 , Zongyao Qian 1 , Ruigang Liu 1 , Yangyang Niu 1 , Yonghua Chen 1 , Xiaoji Xie 1 , Hui Zhang 1
Affiliation
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The stability of perovskite solar cells, especially at high temperature (85 °C) conditions, is one of the most critical aspects to advance practical application. All-inorganic perovskites, by substituting the volatile organic compounds with cesium, have exhibited a promising thermal resistance and energy conversion potentials. However, the thermal stability of the all-inorganic perovskite solar cells is strongly related to the phase transition of the perovskite as well as the thermal resistance of each charge transport and collection layer. Herein, we incorporated Eu(Ac)3 into the perovskite precursor to fabricate photoactive γ-CsPbI2Br. The Eu3+ ions can associate with the negatively charged halide plumbates in the solution and accumulate at the grain boundaries in the as-achieved thin films, effectively reducing the nonradiative recombination centers and stabilizing the γ-CsPbI2Br with moderate grain size. A champion efficiency above 12% in an inverted device architecture can be achieved. In the presence of Eu3+ ions, the phase transition of the γ-CsPbI2Br to nonperovskite is significantly mitigated and can be reversibly restored via thermal repairing. Moreover, we thermally treat the electron transport [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) layer prior to the device completion to induce nanomorphology reorientation and replace the reactive Ag electrode by inert Cu to prevent electrode corrosion by diffusive halide ions from the perovskite. As a result, the thermal (at 85 °C, time to 80% of the initial efficiency or t80 ≈ 200 h) and moisture (relative humidity or RH = 40%, t80 > 500 h) stability of the all-inorganic CsPbI2Br solar cells can be remarkably enhanced.
中文翻译：
具有卓越耐热性的镧系元素稳定的全无机CsPbI 2 Br钙钛矿太阳能电池
钙钛矿太阳能电池的稳定性，特别是在高温（85°C）条件下，是推进实际应用的最关键方面之一。通过用铯代替挥发性有机化合物，全无机钙钛矿具有良好的耐热性和能量转换潜力。然而，全无机钙钛矿太阳能电池的热稳定性与钙钛矿的相变以及每个电荷传输和收集层的热阻密切相关。在此，我们结合的Eu（AC）3到钙钛矿的前体来制造光敏γ-CsPbI 2溴。欧盟3+离子可与在作为-实现薄膜上的溶液，并积聚在晶粒边界中的带负电荷的卤化物铅酸盐相关联，有效地降低了非辐射复合中心，稳定γ-CsPbI 2具有中等粒度溴。在倒置器件架构中，可以实现高于12％的冠军效率。在Eu的存在3+离子时，γ-CsPbI的相变2 BR要nonperovskite被显著减轻，并且可以通过热修复被可逆地还原。此外，我们对电子输运[6,6]-苯基-C61-丁酸甲酯（PC 61器件完成之前的BM）层诱导纳米形态重新定向，并用惰性Cu代替活性Ag电极，以防止因钙钛矿中的卤化物扩散离子而腐蚀电极。其结果是，热（在85℃下，的初始效率或时间到80％吨80 ≈200 h）和湿度（相对湿度或RH = 40％，吨80 > 500 h）上的所有无机的稳定性可以显着增强CsPbI 2 Br太阳能电池。
更新日期：2021-04-26
中文翻译：
具有卓越耐热性的镧系元素稳定的全无机CsPbI 2 Br钙钛矿太阳能电池
钙钛矿太阳能电池的稳定性，特别是在高温（85°C）条件下，是推进实际应用的最关键方面之一。通过用铯代替挥发性有机化合物，全无机钙钛矿具有良好的耐热性和能量转换潜力。然而，全无机钙钛矿太阳能电池的热稳定性与钙钛矿的相变以及每个电荷传输和收集层的热阻密切相关。在此，我们结合的Eu（AC）3到钙钛矿的前体来制造光敏γ-CsPbI 2溴。欧盟3+离子可与在作为-实现薄膜上的溶液，并积聚在晶粒边界中的带负电荷的卤化物铅酸盐相关联，有效地降低了非辐射复合中心，稳定γ-CsPbI 2具有中等粒度溴。在倒置器件架构中，可以实现高于12％的冠军效率。在Eu的存在3+离子时，γ-CsPbI的相变2 BR要nonperovskite被显著减轻，并且可以通过热修复被可逆地还原。此外，我们对电子输运[6,6]-苯基-C61-丁酸甲酯（PC 61器件完成之前的BM）层诱导纳米形态重新定向，并用惰性Cu代替活性Ag电极，以防止因钙钛矿中的卤化物扩散离子而腐蚀电极。其结果是，热（在85℃下，的初始效率或时间到80％吨80 ≈200 h）和湿度（相对湿度或RH = 40％，吨80 > 500 h）上的所有无机的稳定性可以显着增强CsPbI 2 Br太阳能电池。
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