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在BIOI电影中,带状传输和电荷载体动态
Snigdha Lal1, Marcello Righetto1, Aleksander M Ulatowski1
1Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX13PU, United Kingdom.
The journal of physical chemistry letters
|July 18, 2023
概括
氧化 (BiOI) 显示出有前途的电荷载体移动性,克服了无矿启发的无材料的自我捕获限制. 这项研究强调了BIOI作为未来太阳能电池应用的潜在优质光采集半导体.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 太阳能光伏发电是如何实现的
背景情况:
- 合物矿 (LHP) 主导高效的太阳能电池,但对毒性的担忧推动了对替代品的研究.
- 无矿启发材料 (PIM) 具有潜力,但由于自我陷,它们往往遭受负荷载体移动性差.
- 基于石的PIM,虽然丰富且无毒,但表现出显著的超快速电荷载体定位,限制了它们的性能.
研究的目的:
- 为了研究 bismuth oxyiodide (BiOI) 薄膜的电荷载体动力学和传输特性.
- 为了确定BiOI是否表现出电荷载体自我陷,这是无替代品中常见的问题.
- 评估BiOI作为高性能光采集半导体的潜力.
主要方法:
- 太赫兹 (THz) 光导电的动力学测量.
- 瞬态光发光谱学. 瞬态光发光谱学.
- 微波导电谱学 微波导电谱学.
主要成果:
- 生物薄膜显示出显著缺乏超快的电荷载体自我陷.
- 观察到充电载体的移动性很好,从295K的3厘米V-1升至5K的13厘米V-1升,表明带状运输.
- 电荷特异性电子捕获在缺陷发生在纳米秒内,具有低的双分子重组.
结论:
- 与其他木基半导体相比,BiOI具有优越的电荷载体传输特性.
- 由于没有自我陷,使BiOI成为无太阳能电池的有希望的候选人.
- 进一步开发被动化技术可以提高BIOI作为光收获材料的潜力.
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