期刊
APPLIED SURFACE SCIENCE
卷 412, 期 -, 页码 657-667出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.03.204
关键词
Surface passivation; Silicon solar cells; Dielectric thin films; Corona discharge
类别
资金
- EPSRC (UK) [EP/M022196/1]
- EPSRC [EP/M024911/1, EP/J01768X/2]
- Engineering and Physical Sciences Research Council [EP/M024911/1, EP/M022196/1] Funding Source: researchfish
- EPSRC [EP/M024911/1, EP/M022196/1] Funding Source: UKRI
Recombination at the semiconductor surface continues to be a major limit to optoelectronic device performance, in particular for solar cells. Passivation films reduce surface recombination by a combination of chemical and electric field effect components. Dielectric films used for this purpose, however, must also accomplish optical functions at the cell surface. In this paper, corona charge is seen as a potential method to enhance the passivation properties of a dielectric film while maintaining its optical characteristics. It is observed that corona charge can produce extreme reductions in surface recombination via field effect, in the best case leading to lifetimes exceeding 5 ms at an injection of 10(15) cm(-3). For a 200 n-type 1 Omega cm c-Si wafer, this equates to surface recombination velocities below 0.65 cm/s and J(oe) values of 0.92 fA/cm(2). The average improvement in passivation after corona charging gave lifetimes of 1-3 ms. This was stabilised for a period of 3 years by chemically treating the films to prevent water absorption. Surface recombination was kept below 7 cm/s, and J(oe) <16.28 fA/cm(2) for 3 years, with a decay time constant of 8.7 years. Simulations of back-contacted n-type cells show that front surface recombination represents less than 2% of the total internally generated power in the cell (the loss in power output) when the passivation is kept better than 16 fA/cm(2), and as high as 10% if front recombination is worse than 100 fA/cm(2). (C) 2017 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据