一个多频段NIR升级转换核心外设计,用于增强太阳能电池的光收获
Yue Wang1, Wen Xu2, Haichun Liu3
1State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 130012, Changchun, China.
Light, science & applications
|November 24, 2024
概括
这项研究引入了高效的化物上转化纳米粒子 (UCNPs),以扩大太阳能电池 (SSC) 的近红外 (NIR) 响应. 新型多带UCNP显著提高NIR吸收,提高太阳能电池的效率.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 太阳能光伏发电是如何实现的
背景情况:
- 在近红外 (NIR) 区域探索兰化物上转换 (UC) 以增强太阳能电池 (SSC).
- 传统的UC材料面临由于狭窄的NIR激发带宽和低UC效率的限制,阻碍了实际应用.
研究的目的:
- 设计一个高效的多带UC系统,使用合兰化物/的核心外上转换纳米粒子 (Ln/Yb-UCNPs).
- 克服传统的UC材料的局限性,以改善SSC中的NIR吸收.
主要方法:
- 开发的Ln/Yb-UCNP具有明显的兰化离子 (Ln3+) 层 (Ho3+,Er3+,Tm3+),用于广泛的NIR吸收 (1100-2200nm).
- 研究了一种合成电子 (SEP) 效应,涉及Yb3+通过能量转移和交叉放松来提高UC效率.
- 将Ln/Yb-UCNP集成到SSC中,并在标准AM 1.5G照射下评估它们的性能.
主要成果:
- 在1100-2200nm范围内实现了跨越~500nm的宽带多带吸收.
- 确定了SEP效应,通过将电子转移到Yb3+兴奋状态来提高UC效率,产生强烈的~980nm发光.
- 使用Ln/Yb-UCNP的SSC取得了最大的NIR响应范围 (高达2200nm) 和0.87%的绝对效率增加 (总共19.37%).
结论:
- 开发的多频段Ln/Yb-UCNP有效地解决了UCNP合SSC的瓶问题.
- 这种方法提供了一种可行的策略,可以显著扩大NIR响应并提高太阳能电池的光伏效率.
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