GaP:Ti 光电器件的光电特性

IF 7.1 3区材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Materials Today Sustainability Pub Date : 2024-10-17 DOI:10.1016/j.mtsust.2024.101008

J. Olea , J. Gonzalo , J. Siegel , A.F. Braña , G. Godoy-Pérez , R. Benítez-Fernández , D. Caudevilla , S. Algaidy , F. Pérez-Zenteno , S. Duarte-Cano , A. del Prado , E. García-Hemme , R. García-Hernansanz , D. Pastor , E. San-Andrés , I. Mártil

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引用次数: 0

摘要

由于能量低于带隙（2.26 eV）的光跃迁可将整体设备效率提高到理论上的 60%，因此过饱和 GaP 在光伏领域备受关注。我们之前已经证明，可以通过离子注入和脉冲激光熔化的方法获得钛过饱和 GaP，而且结构质量很高，并测量了其低于带隙的光导率。在这项工作中，我们首次报告了基于 GaP:Ti 的光伏器件的研究结果。我们制作并测量了带有 GaP:Ti 吸收层的光伏器件，结果表明，在波长超过 550 纳米时，该器件的外部量子效率有所提高。此外，我们还测量了该吸收层的吸收系数（约 104 cm-1）和折射率。最后，我们使用双二极管模型测量并分析了黑暗环境下的电流-电压曲线，结果表明其特性得到了改善。此外，还提出了增强设备特性的建议。

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Optoelectronic properties of GaP:Ti photovoltaic devices

Supersaturated GaP is of interest for the photovoltaic field since optical transitions at energies below the bandgap (2.26 eV) could enhance the overall device efficiency up to theoretically 60%. We have previously demonstrated that Ti supersaturated GaP can be obtained by means of ion implantation and pulsed-laser melting with high structural quality and measured its below-bandgap photoconductivity. In this work we report the first results of a GaP:Ti based photovoltaic device. We have fabricated and measured photovoltaic devices with a GaP:Ti absorber layer showing enhanced external quantum efficiency at wavelengths above 550 nm. Also, we have measured the absorption coefficient (around 10⁴ cm⁻¹) and refractive index of this absorber layer. Finally, current-voltage curves in darkness were measured and analyzed using a two-diodes model, showing improvable characteristics. Ideas to enhance the properties of the devices are suggested.

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来源期刊

Materials Today Sustainability Multiple-

CiteScore

5.80

自引率

6.40%

发文量

174

审稿时长

32 days

期刊介绍： Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science. With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.