Cu(In, Ga)Se₂ (CIGS)-based materials have gained remarkable attention for thin-film photovoltaic applications due to their high absorption coefficient, tunable bandgap, compositional tolerance, outstanding stabilities, and high efficiency. A small increase in the efficiency of CIGS solar cells has huge economic impact and practical importance. As such, we fabricated a flexible CIGS solar cell on amica substrate and demonstrated the enhanced device performance through the piezo- and pyro-phototronic effects based on a ZnO thin film. The device showed enhanced energy conversion efficiency from 13.48% to 14.23% by decreasing the temperature from 31 to 2 °C at a rate of ∼ 0.6 °C·s⁻¹ via the pyro-phototronic effect, and further enhanced from 14.23% to 14.37% via the piezo-phototronic effect by further applying a static compressive strain. A pyro-electric nanogenerator effect was also found to promote the performance of the CIGS solar cell at the beginning of the cooling process. The manipulated energy band of the CIGS/CdS/ZnO heterojunction under the influence of the inner pyroelectric and piezoelectric potentials is believed to contribute to the sephenomena. Applying the piezo- and pyro-phototronic effects simultaneously offers a new opportunity for enhancing the output performance of commercialthin film solar cells.

中文翻译：

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压电和热光效应增强Cu（In，Ga）Se 2薄膜太阳能电池

Cu（In，Ga）Se ₂（CIGS）基材料因其高吸收系数，可调带隙，成分耐受性，出色的稳定性和高效率而在薄膜光伏应用中获得了广泛的关注。CIGS太阳能电池效率的小幅提高具有巨大的经济影响和实际意义。这样，我们就在Amica基板上制造了柔性CIGS太阳能电池，并通过基于ZnO薄膜的压电和热释光效应展示了增强的器件性能。通过以约0.6°C·s ^-1的速度将温度从31°C降低到2°C，该器件将能量转换效率从13.48％提高到14.23％。通过热光电子效应，并通过进一步施加静态压缩应变，通过压电光电子效应进一步从14.23％提高到14.37％。在冷却过程开始时，还发现了热电纳米发电机效应可提高CIGS太阳能电池的性能。据信，在内部热电和压电势的影响下，CIGS / CdS / ZnO异质结的可操纵能带有助于表观现象。同时应用压电和热释光效应为增强商业薄膜太阳能电池的输出性能提供了新的机会。