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- Title
Toward Efficient Radial Junction Silicon Nanowire‐Based Solar Mini‐Modules.
- Authors
Al‐Ghzaiwat, Mutaz; Foti, Antonino; Nuesslein, André; Halagacka, Lukas; Meot, Jacques; Labouret, Anne; Ossikovski, Razvigor; Roca i Cabarrocas, Pere; Foldyna, Martin
- Abstract
In this work, laser scribing is used to obtain a monolithic series connection between adjacent silicon nanowire radial junction (SiNW RJ) solar cells on the same glass substrate. The SiNW RJ solar cells have been deposited in a low‐temperature plasma‐enhanced chemical vapor deposition (PECVD) reactor in a single pump‐down process. The crystalline SiNWs have been grown by plasma‐assisted vapor‐liquid‐solid method using tin (Sn) metal drops as a growth catalyst. A detailed study of the laser scribing step P2 is performed for better selective removal of the SiNW RJs. The laser scribed spots are characterized by scanning electron microscopy (SEM) and Raman spectroscopy mapping. In addition, a silver grid is optimized and inkjet printed on top of the mini‐modules for better device performance. Based on that, a very good performance of the SiNW RJ mini‐modules is achieved with an energy conversion efficiency over 4% and power generation in the active area of 10 cm2. This work presents a break‐through in the modularization of the SiNW RJ solar cells and demonstrates the potential of the silicon nanowire devices for industrial applications as well as their compatibility with industrial fabrication processes. This letter reports on high performance large area silicon nanowire radial junction mini‐modules with energy conversion efficiency of 5% obtained with seven cells connected in series on the same glass substrate with total active area of 10 cm2. The performance is achieved after detailed study and optimization of the P2 laser scribing step and ink‐jet printing of the silver grid.
- Subjects
SILICON nanowires; SOLAR cells; PLASMA-enhanced chemical vapor deposition; CHEMICAL reactors; ENERGY conversion; SCANNING electron microscopy; RAMAN spectroscopy
- Publication
Physica Status Solidi - Rapid Research Letters, 2019, Vol 13, Issue 2, pN.PAG
- ISSN
1862-6254
- Publication type
Article
- DOI
10.1002/pssr.201800402