Zandi Soma, Nie Shuai, Zhu Yan, Allen Thomas G, Aydin Erkan, Ugur Esma, Zheng Jianghui, Wang Guoliang, Liu Xu, Hao Xiaojing, Ho-Baillie Anita, De Wolf Stefaan, Trupke Thorsten, Hameiri Ziv
University of New South Wales, Sydney, New South Wales, 2052, Australia.
Material Science and Engineering Program (MSE), KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.
Small Methods. 2025 Apr;9(4):e2401003. doi: 10.1002/smtd.202401003. Epub 2025 Apr 1.
A luminescence-based technique is demonstrated for selectively imaging the implied voltages of tandem solar cells. The luminescence emission is captured using a narrow bandpass filter so that the detected luminescence signal is insensitive to the optical properties of the device, thus, revealing the variations in the implied voltages. The proposed method is validated through simulation and experiments conducted on two-terminal perovskite/silicon tandem solar cells with different structures, optical properties, and compositions (e.g., different bandgaps for the perovskite cells). Implied voltage images of each sub-cell can be determined with a maximum relative error of 1%. The proposed technique can also be used to obtain local current-voltage curves. The method is expected to be a valuable tool for optimizing the performance of tandem solar cells, scaling up tandem devices, investigating local defects, and predicting the ultimate device performance.
展示了一种基于发光的技术，用于选择性地对串联太阳能电池的隐含电压进行成像。使用窄带通滤波器捕获发光发射，使得检测到的发光信号对器件的光学特性不敏感，从而揭示隐含电压的变化。通过对具有不同结构、光学特性和组成（例如，钙钛矿电池具有不同带隙）的两端钙钛矿/硅串联太阳能电池进行模拟和实验，验证了所提出的方法。每个子电池的隐含电压图像可以以最大1%的相对误差确定。所提出的技术还可用于获得局部电流-电压曲线。该方法有望成为优化串联太阳能电池性能、扩大串联器件规模、研究局部缺陷以及预测器件最终性能的有价值工具。
