Efficiency simulations on perovskite solar cells only using experimentally determined reflectance and transmittance data
Efficiency simulations on perovskite solar cells only using experimentally determined reflectance and transmittance data
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DOI：
10.1016/j.solmat.2019.110039
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发表时间：
2019-10
影响因子：
6.9
通讯作者：
Lili Zhang;S. Ding;G. Qin
中科院分区：
文献类型：
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作者：
Lili Zhang;S. Ding;G. Qin
不断刷新的效率记录使钙钛矿太阳能电池（PSCs）处于光伏研究的前沿。功率转换效率（PCE）是评价PCE光伏性能的关键因素，也是最直观的参数。本工作提出了一种更简单、更快速的方案，仅使用钙钛矿材料的反射率和透射率数据来模拟PSCs的pce。以CH3NH3PbI3PSC和Cs2AgBiBr6PSC为例，根据实验测量的反射率和透射光谱，推导出ch3nh3pbi3和cs2agbibr6的复折射率，并利用传递矩阵法模拟光通过PSC的传播过程。由传递矩阵法导出的光吸收决定了电流-电压特性中的光产生电流。同时考虑了串联电阻和并联电阻对pce的影响。制备的ch3nh3pbi3和Cs2AgBiBr6PSCs的pce分别为15.72%和1.55%。通过比较，模拟预测的pce值分别为18.45%和4.64%，略高估，但较为合理。
The constantly refreshed efficiency records have put the perovskite solar cells (PSCs) at the forefront of photovoltaic research. Power conversion efficiency (PCE) is a key factor as well as the most intuitive parameter to assess the photovoltaic performance of a PSC. This work proposes an easier and faster scheme to simulate PCEs of PSCs only using the reflectance and transmittance data of the perovskite materials. Taking the CH3NH3PbI3PSC and the Cs2AgBiBr6PSC as examples, the complex refractive indices of CH3NH3PbI3and Cs2AgBiBr6are derived from the experimentally measured reflectance and transmittance spectra, which are then used in the transfer matrix method to simulate the process of light propagating through the PSC. The light absorption derived from the transfer matrix method determines the photo-generated current in the current-voltage characteristics. Influences of the series resistance and the shunt resistance on PCEs are also taken into account. The best-performing CH3NH3PbI3and Cs2AgBiBr6PSCs fabricated in this work exhibit PCEs of 15.72% and 1.55%. By comparison, simulations predict PCEs of 18.45% and 4.64%, which are slightly overestimated but reasonable.