铜铟镓硒薄膜光伏组件中电池与封装材料界面的光学特性对组件性能的影响

根据测试数据,分析模拟了铜铟镓硒(CIGS)薄膜光伏组件中电池的活性区域、非活性区域与封装材料之间界面的光学特性对组件的短路电流产生的影响。根据组件结构建立了光学模型,从光学模拟结果分析组件内的反射与吸收。发现电池前电极透明导电氧化物薄膜(TCO)与封装材料界面的反射不可忽视,提出通过在透明导电氧化物薄膜与封装材料之间添加减反射层,并以MgO作为膜层材料以降低活性区域的界面反射;模拟了在非活性区域一次反射光角度与二次反射的关系,由此分析了非活性区域反射面倾角、镜面反射与漫反射比例对光利用的影响。模拟结果显示,活性区域的减反层结构可降低透明导电氧化物薄膜表面的反射率1%以上,而通过在非活性面积区域制备光反射结构,理论上能够利用非活性区域光照超过50%。

Influence of Cell/Encapsulation Material Interface Optical Properties on Cu(InGa)Se2 Solar Module Performance

The influence of cell/encapsulant interface optical properties of active and non-active areas on Cu(InGa)Se2 PV module short-circuit current was studied by simulation based on measurement data.The absorption and reflection inside the module were analyzed according to the simulation of models established based on Cu(InGa)Se2 module structure.It reveals that the reflection of TCO/encapsulant interface is not negligible in active area.So,MgO as the anti-reflection coating is proposed.The relation between first reflection angle and the second reflectivity was simulated in non-active area.Based on this,the influences of reflector inclination and the ratio of specular/diffuse reflection on light utilization were analyzed.The simulation results show that the MgO anti-reflection coating in active area reduces the interface reflection for over 1%and the light in non-active area could be utilized for over 50%by preparing reflection structure in non-active area,theoretically.