Efficiency Enhancement of Silicon Heterojunction Solar Cells via Photon Management Using Graphene Quantum Dot as Downconverters
Efficiency Enhancement of Silicon Heterojunction Solar Cells via Photon Management Using Graphene Quantum Dot as Downconverters
复制标题
使用石墨烯量子点作为下变频器通过光子管理提高硅异质结太阳能电池的效率
DOI：
10.1021/acs.nanolett.5b03814
复制
发表时间：
2016-01-01
期刊：
影响因子：
10.8
通讯作者：
He, Jr-Hau
中科院分区：
文献类型：
--
作者：
Tsai, Meng-Lin;Tu, Wei-Chen;He, Jr-Hau
利用石墨烯量子点，我们在n型硅异质结太阳电池中获得了16.55%的高效率。效率的提高是基于GQD的光子下转换现象，使更多的光子被吸收到耗尽区进行有效的载流子分离，从而导致增强的光伏效应。短路电流由35.31 mA/cm(2)提高到37.47 mA/cm(2)，填充因子由70.29%提高到72.51%。这里展示的工作有望在未来开发超高效率光伏电池的商业太阳能设备中引入石墨烯材料。
By employing graphene quantum dots (GQDs), we have achieved a high efficiency of 16.55% in n-type Si heterojunction solar cells. The efficiency enhancement is based on the photon downconversion phenomenon of GQDs to make more photons absorbed in the depletion region for effective carrier separation, leading to the enhanced photovoltaic effect. The short circuit current and the fill factor are increased from 35.31 to 37.47 mA/cm(2) and 70.29% to 72.51%, respectively. The work demonstrated here holds the promise for incorporating graphene-based materials in commercially available solar devices for developing ultrahigh efficiency photovoltaic cells in the future.