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A light trapping method is proposed making use of non-tracking concentrators taking into account the solar resource over an entire year. The maximum concentration achievable was calculated to be 4.6 for a PV cell embedded in glass. This method was applied to thin film solar cells, in particular aSi and CIGS solar cells. The aSi stack consisted of ZnO, aSi, and ZnO, while the CIGS stack consisted of...
We have systemically studied effect of n-SiOx:H layers with relatively high oxygen content on silicon-based solar cell performance for use as a multi-functional layer. Optimization of n-SiOx:H layers and their application to μc-Si:H single-junction and a-Si:H/μc-Si:H tandem solar cells have experimentally been conducted. The μc-Si:H single-junction solar cells with novel structure p-μc-SiO:H/ i-μc-Si:H/...
Transparent conducting oxides (TCOs) with qualitatively better resistance to humidity than ZnO, the traditional Cu(In,Ga)Se2 (CIGS) TCO, are needed to reduce the water-induced degradation of CIGS photovoltaics (PV). Amorphous In-Zn-O (a-IZO) is found both to act as a water vapor transport barrier and to be essentially inert in damp heat testing at 85°C, 85%RH (85/85). In particular, no significant...
In order to achieve a high efficient a-Si solar cell, the TCO (transparent conductive oxide) substrates are required to be a low sheet resistivity, a high transparency, and a textured surface with light trapping effect. Recently, a zinc oxide (ZnO) thin film attracts our attention as new coating material having a good transparent and conductive for TCO of solar cells1-2.
Silicon-based thin-film photovoltaics is on the way the overcome drawbacks such as high degradation and low efficiencies by applying novel multiple-junction solar cells consisting of amorphous and microcrystalline absorber layers. In order to produce reliable high-power low-cost solar modules the design of the back contact and back reflector is an important issue. In this paper, ersol Thin Film GmbH...
The present paper will give insight into amorphous silicon based photovoltaic thin film technology with a special focus on implementing LPCVD ZnO front contact. ersol Thin Film GmbH (ETF) evaluated amorphous silicon modules on growth-textured Zinc Oxide (ZnO) films. The process is based on substrate glasses with outer dimensions of 1100 × 1300 mm2. The use of growth-textured Zinc Oxide layers for...
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