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优化蒸汽动力学增强异构连接的载体运输:制造高效Sb2太阳能电池的新策略
Weihuang Wang1,2, Junjie Lin1, Jieming Ke1
1Fuzhou University, Institute of Micronano Devices & Solar Cells, College of Physics & Information Engineering, Fuzhou, 350108, P. R. China.
一种新的平均自由路调制 (MFPM) 策略增强了(III) 硫化 (Sb2(S,Se) 3) 太阳能电池. 这种方法优化了膜质量和接口,显著提高了功率转换效率 (PCE) 和短路电流密度 (JSC).
科学领域:
- 材料科学 材料科学 材料科学
- 太阳能光伏发电是如何实现的
- 薄膜沉积的情况
背景情况:
- 反 (III) 硫化二氧化 (Sb2 (S,Se) 3) 太阳能电池看起来很有前途,但面临着挑战.
- 真空沉积方法遭受了素损失和不稳定的接口,限制了效率.
研究的目的:
- 为了解决Sb2(S,Se) 3太阳能电池的效率限制.
- 引入和验证一个平均自由路径调制 (MFPM) 策略,以改善薄膜沉积.
主要方法:
- 研究了沉积压对Sb2(S,Se) 3膜特性的影响.
- 利用MFPM策略来控制蒸汽分子的平均自由路径和动能.
- 分析了薄膜厚度,紧度,结晶度和缺陷形成.
- 评估了CdS/Sb2(S,Se) 3异质连接接口的接口质量和频段对齐.
- 评估载体运输特性和设备性能.
主要成果:
- 在更高的压力下降的平均自由路径导致更薄,更不紧,更不结晶的Sb2(S,Se) 3膜.
- 平均自由路径和运动能量的减少促进了Sb2O3的形成和有害的缺陷.
- 优化了接口质量 (ΔEC = -0.19 eV) 和在0.5Pa时的[hk1]方向.
- 分别减少了50%和两个数量级的接口和散装缺陷.
- 实现了短路电流密度 (JSC) 的增长31%,功率转换效率 (PCE) 的增长33%.
结论:
- 多元片管理策略有效地提高了Sb2(S,Se) 3片质量和设备性能.
- 优化的沉积条件 (0.5Pa) 显著提高了太阳能电池的效率.
- 在真空转移沉积 (VTD) 处理的Sb2(S,Se) 3太阳能电池中实现了8.08%的PCE和29.66 mA cm−2的JSC记录.
- 突出了MFPM在制造高效复合光伏薄膜方面的潜力.
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