微晶
微晶硅
材料科学
各向异性
扩散
晶界
微观结构
硅
无定形固体
化学物理
电荷(物理)
电导率
凝聚态物理
非晶硅
化学
光学
结晶学
晶体硅
光电子学
复合材料
热力学
物理
物理化学
量子力学
作者
J. Kočka,A. Fejfar,H. Stuchlı́ková,J. Stuchlı́k,P. Fojtı́k,T. Mates,Bohuslav Rezek,K. Luterová,Vladimír Švrček,I. Pelant
标识
DOI:10.1016/s0927-0248(02)00449-x
摘要
Charge transport in microcrystalline silicon is strongly influenced by its heterogeneous microstructure composed of crystalline grains and amorphous tissue. An even bigger effect on transport is their arrangement in grain aggregates or possibly columns, separated by grain boundaries, causing transport anisotropy and/or depth profile of transport properties. We review special experimental methods developed to study the resulting transport features: local electronic studies by combined atomic force microscopy, anisotropy of conductivity and diffusion length and also their thickness dependence. A simple model based on the concept of changes of transport path for description of the observed phenomena is reviewed and its consequences for charge collection in microcrystalline based solar cells are discussed.
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