面向太阳光全光谱应用铒掺杂硫卤玻璃上转换发光特性研究

使用熔融淬冷法制备了Er³⁺掺杂Ge-Ga-S-CsBr硫卤玻璃, 研究了其在1550 nm激光激发下的上转换发光特性, 观察到强的波长中心位于525和545 nm绿色发光及弱的中心波长位于660 nm红色发光, 也观察到了中心波长分别位于810和980 nm的红外上转换发光。基于泵探光功率关系和能级寿命测试研究了发光机理, 发现中间态能级寿命的延长是上转换发光效率增强的根本原因。使用全光谱光源测试了Si太阳能效率, 当使用上转换发光层时, 太阳能电池平均效率从7.28%上升至7.32%。结果显示所探索的稀土掺杂硫卤玻璃有望应用于硅太阳能电池效率增强领域。

Upconversion Luminescence of Er3+ Doped Chalcohalide Glasses and Its Potential Application for Si Solar Cell Efficiency Enhancement

Er³⁺ doped Ge-Ga-S-CsBr chalcohalide glasses were fabricated by melt-quenching method. The properties of upconversion luminescence under the excitation of 1550 nm laser were investigated. Strong green emissions centered at 525 nm and 545 nm, and weak red emission centered at 660 nm, were observed, along with near infrared emission bands centered at 810 nm and 980 nm. The up-conversion fluorescence was contributed to multi-photon involved process. The Si solar cell efficiency slightly increased from 7.28% (without upconversion layer) to 7.32% (using Er³⁺ doped 0.9(Ge₂₅Ga₁₀S₆₅)-0.1CsBr glass as upconversion layer). The results show that the investigated Er³⁺-doped chalcohalide glasses has a potential application for the enhancement of Si solar cell efficiency.