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氏体CuGaO2:一种新的直接和窄带间隙氧化物半导体,可用于太阳能电池吸收器

Takahisa Omata¹, Hiraku Nagatani, Issei Suzuki

¹Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , Suita, Osaka 565-0871, Japan.

Journal of the American Chemical Society

|February 22, 2014

概括

一种新的氧化物半导体,β-CuGaO2,合成了具有太阳能电池理想的特性. 它的1.47 eV带隙和p型导电显示出对有效的太阳能转换的承诺.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
可再生能源可再生能源是可再生能源.

背景情况:

为太阳能电池开发高效和成本效益的材料对于可再生能源至关重要.
氧化物半导体由于其稳定性和可调节性质而具有潜力.

研究的目的:

为了合成和描述一种新的氧化物半导体,β-CuGaO2.2.
评估其作为单结太阳能电池的吸收材料的潜力.

主要方法:

合成β-CuGaO2与一种源于石的结构.
使用X射线衍射 (XRD) 和选区电子衍射 (SAED) 进行结构性表征,并采用瑞特维尔德分析.
光学吸收光谱和热电运动力测量.
密度函数理论 (DFT) 对电子结构和光学属性的计算.

主要成果:

β-CuGaO2成功合成,其晶格大小类似于氧化.
光学吸收显示带隙为1.47 eV,适合单节太阳能电池.
热电测量证实了内在的p型导电.
在DFT计算中,β-CuGaO2被确定为带边附近具有强光吸收的直接半导体.

结论:

在太阳能电池应用中,β-CuGaO2具有有利的电子和光学特性.
它的直接带隙和高吸收效率使其成为下一代太阳能吸收器的有希望的候选人.
这种材料需要进一步研究,以便将其集成到光伏设备中.

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