Shehata Nader, Clavel Michael, Meehan Kathleen, Samir Effat, Gaballah Soha, Salah Mohammed
Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute State University, 302 Whittemore Hall, VA 24061, USA.
Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Elhadara, Alexandria 21544, Egypt.
Materials (Basel). 2015 Nov 12;8(11):7663-7672. doi: 10.3390/ma8115399.
This paper discusses the effect of adding reduced erbium-doped ceria nanoparticles (REDC NPs) as a coating on silicon solar cells. Reduced ceria nanoparticles doped with erbium have the advantages of both improving conductivity and optical conversion of solar cells. Oxygen vacancies in ceria nanoparticles reduce Ce to Ce which follow the rule of improving conductivity of solar cells through the hopping mechanism. The existence of Ce helps in the down-conversion from 430 nm excitation to 530 nm emission. The erbium dopant forms energy levels inside the low-phonon ceria host to up-convert the 780 nm excitations into green and red emissions. When coating reduced erbium-doped ceria nanoparticles on the back side of a solar cell, a promising improvement in the solar cell efficiency has been observed from 15% to 16.5% due to the mutual impact of improved electric conductivity and multi-optical conversions. Finally, the impact of the added coater on the electric field distribution inside the solar cell has been studied.
本文讨论了添加还原铒掺杂二氧化铈纳米颗粒（REDC NPs）作为硅太阳能电池涂层的效果。掺杂铒的还原二氧化铈纳米颗粒具有提高太阳能电池导电性和光学转换的双重优势。二氧化铈纳米颗粒中的氧空位将Ce还原为Ce，通过跳跃机制遵循提高太阳能电池导电性的规律。Ce的存在有助于从430 nm激发下转换为530 nm发射。铒掺杂剂在低声子二氧化铈主体内部形成能级，将780 nm激发上转换为绿色和红色发射。当在太阳能电池背面涂覆还原铒掺杂二氧化铈纳米颗粒时，由于改善的电导率和多光学转换的相互影响，太阳能电池效率从15%提高到16.5%，有了显著提升。最后，研究了添加的涂层对太阳能电池内部电场分布的影响。
