Study of the properties of solar cells based on a-Si:H p-i-n structures by admittance spectroscopy

被引：0

作者：

A. S. Gudovskikh

A. S. Abramov

A. V. Bobyl

V. N. Verbitskiy

K. S. Zelentsov

E. M. Ershenko

D. A. Kudryashov

S. A. Kudryashov

A. O. Monastyrenko

A. R. Terra

E. I. Terukov

机构：

[1] Russian Academy of Sciences,St. Petersburg Academic University, Nanotechnology Research and Education Center

[2] Russian Academy of Sciences,Ioffe Physical

[3] “R&D Center of Thin Film Technologies in Energetics under the Ioffe Institute” OOO,Technical Institute

来源：

Semiconductors | 2013年 / 47卷

关键词：

Fermi Level; Type Region; Valence Band Edge; Metal Organic Vapor Phase Epitaxy; Fermi Level Position;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Properties of solar cells based on a-Si:H p-i-n structures are studied by admittance spectroscopy. The responses of the density of states in the (i)a-Si:H layers and a-SiC:H layers in the p-type region of the structure are distinguished in the admittance spectra. The density of states in the middle of the mobility gap for (i)a-Si:H is estimated to be 5 × 1016 cm−3 eV−1. It is shown that this value increases during the course of photoinduced degradation to ∼1017 cm−3 eV−1. For the wide-gap a-SiC:H layers, the observed response of the density of states in the valence-band tails made it possible to estimate the lower bound for the density of states at the Fermi level (1018 cm−3 eV−1) and to find the Fermi level position to be 0.4 eV above the valenceband edge. The suggested procedure can be used to optimize the design of solar cells in order to improve their efficiency.

引用

页码：1090 / 1096

页数：6

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