用于基半导体和光伏设备的N,N-二甲基胺基分子墨水中的复合化学
James A Clark1, Anna Murray1, Jung-Min Lee1
1Department of Chemical Engineering, Clean Energy Institute, Molecular Engineering & Sciences Institute , University of Washington , Seattle , Washington 98195-1750 , United States.
Journal of the American Chemical Society
|December 12, 2018
概括
使用N,N-二甲基形式胺 (DMF) 和尿素 (TU) 的新分子油墨可以为光伏半导体提供稳定,高度的解决方案. 这克服了溶解性问题,导致铜化 (CIS) 等设备的高功率转换效率.
科学领域:
- 材料科学
- 太阳能发电
- 半导体化学
背景情况:
- 高性能光伏半导体 (CZTS,CIS,CIGS) 的传统分子墨水面临金属前体溶解性的挑战,通常导致沉或凝结.
- 基于二甲基硫化物和硫尿素 (TU) 的现有油墨对某些金属物种有限制,如Ag,In,III和Ge,II/IV.
研究的目的:
- 开发一种新的分子墨水配方,以克服光伏设备中使用的更广泛的金属前体的可溶性和稳定性问题.
- 研究墨水中的化学相互作用及其在溶液加工中稳定金属中的作用.
- 证明新油墨化学在生产高效光伏设备中的有效性.
主要方法:
- 使用N,N-二甲基形式胺 (DMF) 和硫尿素 (TU) 与各种金属化物易斯酸形成稳定的酸复合物 (例如CuCl,AgCl,InCl3,SnCl4).
- 使用热量计,拉曼光谱和可溶性实验来阐明涉及转移和TU的稳定机制.
- 研究了TU甲基化对易斯度和复合稳定性的影响,以防止金属挥发.
主要成果:
- 通过使用DMF-TU系统,成功地从各种金属化物中制造出高度,稳定的分子墨水.
- 证明在DMF中化物转移和TU复合是稳定金属的关键.
- 解决方案处理的光伏设备实现了高功率转换效率 (CIS为13.4%,CZGTS为11.0%) 和高开放电路电压比率 (分别为理论极限的67%和63%).
结论:
- DMF-TU分子墨水化学为溶液加工的高性能光伏材料提供了多功能和有效的平台.
- 这种方法克服了前体的可溶性和稳定性限制,使CIS和CZGTS等半导体的有效沉积成为可能.
- 开发的油墨有助于制造具有成本效益和高效率的太阳能电池.
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