Temperature-Dependent Carrier Extraction and the Effects of Excitons on Emission and Photovoltaic Performance in Cs 0.05 FA 0.79 MA 0.16 Pb(I 0.83 Br 0.17 ) 3 Solar Cells
Temperature-Dependent Carrier Extraction and the Effects of Excitons on Emission and Photovoltaic Performance in Cs 0.05 FA 0.79 MA 0.16 Pb(I 0.83 Br 0.17 ) 3 Solar Cells
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温度依赖性载流子提取以及激子对 Cs 0.05 FA 0.79 MA 0.16 Pb(I 0.83 Br 0.17 ) 3 太阳能电池发射和光伏性能的影响
DOI：
10.1021/acsami.2c11657
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发表时间：
2022
影响因子：
9.5
通讯作者：
Sellers, Ian R.
中科院分区：
文献类型：
--
作者：
Afshari, Hadi;Durant, Brandon K.;Kirmani, Ahmad R.;Chacon, Sergio A.;Mahoney, John;Whiteside, Vincent R.;Scheidt, Rebecca A.;Beard, Matthew C.;Luther, Joseph M.;Sellers, Ian R.
研究了三重阳离子钙钛矿[Cs0.05FA0.79MA0.16Pb（I0.83Br0.17）3]太阳能电池的光伏参数，重点研究了电池的光电特性以及低温和高温下的性能差异。在低温下观察到寄生势垒对载流子提取的特征，这导致T < 200 K时的性能损失。依赖于强度的测量表明，穿过该寄生界面的提取受到激子结合能和热离子发射的组合的限制。然而，器件的光伏性能在低强度下恢复，其中光生载流子产生速率阈值低于电子提取速率。还观察到太阳能电池性能的损失与光致发光强度的增加密切相关，表明抑制载流子提取导致强辐射复合，并且这些系统似乎不受显着的热激活非辐射过程的限制。由于激子效应有限的载流子提取的证据也观察到在较低的温度下观察到的光致发光和载流子提取的强反相关。
The photovoltaic parameters of triple cation perovskite [Cs0.05FA0.79MA0.16Pb(I0.83Br0.17)3] solar cells are investigated focusing on the electro-optical properties and differences in performance at low and high temperatures. The signature of a parasitic barrier to carrier extraction is observed at low temperatures, which results in a loss of performance atT< 200 K. Intensity-dependent measurements indicate extraction across this parasitic interface is limited by a combination of the exciton binding energy and thermionic emission. However, the photovoltaic performance of the device is recovered at low intensity─where the photocarrier generation rate threshold is lower than the thermionic extraction rate. Loss of solar cell performance is also observed to be strongly correlated to an increase in photoluminescence intensity, indicating inhibited carrier extraction results in strong radiative recombination and that these systems do not appear to be limited by significant thermally activated non-radiative processes. Evidence of limited carrier extraction due to excitonic effects is also observed with a strong anti-correlation in photoluminescence and carrier extraction observed at lower temperatures.