摘要
太阳能电池的光电转换效率仍然较低,并且进一步提高效率非常困难。相对来说,通过提高太阳能电池透明电极的性能是一个简单有效的方法。石墨烯仅有一个sp2碳原子的厚度,超高的载流子迁移率使它可以极大地降低透过率与导电性之间此消彼长关系的影响,同时具备高透光和高导电的特性,因此有望替代目前的商业标准氧化铟锡(ITO)。化学掺杂可以大大降低石墨烯面电阻并调整石墨烯的功函数至合适值。本文的分析表明石墨烯作为太阳能电池透明电极应该是可行的并且具有优越性。
The power conversion efficiency of solar cells remains in a low level and is very difficult for further improvement. Relatively, a better transparent conductor may be a simple and effective way to improve the performance of solar cells. Gra- phene, a monolayer of sp2 bonded carbon atoms in a honeycomb lattice with thickness of 0.34 nm and super high carrier mobility, has the ability of reducing the influence of the trade-off between optical transmittance and electrical conductivity greatly, and therefore to replace the current commercial standard, indium tin oxide （ ITO）. The chemical doping can reduce the sheet resistance of graphene and adjust the workfunction to a proper value. This paper discusses the feasibility of gra- phene as solar cells＇ transparent conductor.
出处
《真空与低温》
2012年第3期160-166,共7页
Vacuum and Cryogenics
关键词
石墨烯
透明电极
太阳能电池
graphene
transparent electrode
solar cell
