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通过表面硫化构建高效反转矿太阳能电池的异质连接
Xiaodong Li1, Wenxiao Zhang1, Xuemin Guo1
1School of Physics and Electronic Science, Engineering Research Center of Nanophotonics and Advanced Instrument, Ministry of Education, East China Normal University, Shanghai 200062, China.
Science (New York, N.Y.)
|January 27, 2022
概括
矿薄膜的表面硫化产生了高效的反向太阳能电池的稳定异质连接. 这一突破提高了电力转换效率和设备寿命,为先进的光伏技术铺平了道路.
科学领域:
- 材料科学
- 可再生能源
- 固态物理
背景情况:
- 矿太阳能电池提供高功率转换效率,但存在稳定性问题.
- 接口工程对于优化矿太阳能电池中的电荷提取和设备性能至关重要.
研究的目的:
- 通过表面硫化,为反向太阳能电池构建稳定的矿异质连接.
- 研究-硫键对矿薄膜电子性质和稳定性的影响.
- 提高逆转矿太阳能电池的性能和使用寿命.
主要方法:
- 制造富含 (Pb) 的矿膜.
- 通过硫化进行表面处理以形成-硫 (Pb-S) 键.
- 矿接口和电子属性的特征.
- 倒置太阳能电池设备的制造和测试.
- 在热和照明压力下进行长期稳定性测试.
主要成果:
- 通过表面硫化成功构建稳定的矿异质连接.
- Pb-S 键的形成使费米水平上升,并诱导后面电场以改善电子提取.
- 在1.19V的高开路电压下达到超过24%的功率转换效率 (PCE).
- 在85°C老化2200小时或连续运行1000小时后,该装置的稳定性得到了提高,保持了90%以上的初始PCE.
- 观察到矿异质连接的稳定性和底层矿结构的强化.
结论:
- 表面硫化是一种有效的策略,用于在倒置太阳能电池中创建稳定的矿异质连接.
- 在提高设备性能和长期稳定性方面,Pb-S债券起着至关重要的作用.
- 这种方法显著减少了电压损失,并改善了矿光伏设备的使用寿命.
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