<p>Lowering firing temperature of a p-type passivated emitter rear contact Si solar cell via current injection</p>
- Authors
- Choi, Dongjin; Park, HyunJung; Bae, Soohyun; Shin, Seung Hyun; Han, Hyebin; Kloeter, Bernhard; Kim, Donghwan; Lee, Hae-Seok; Kang, Yoonmook
- Issue Date
- 1-6월-2022
- Publisher
- ELSEVIER
- Keywords
- Silicon solar cells; Metallization; Current injection; Low-temperature; Screen-printed Ag contact
- Citation
- SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.239
- Indexed
- SCIE
SCOPUS
- Journal Title
- SOLAR ENERGY MATERIALS AND SOLAR CELLS
- Volume
- 239
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/140800
- DOI
- 10.1016/j.solmat.2022.111587
- ISSN
- 0927-0248
- Abstract
- Effective contact formation during low-temperature firing with applied current was investigated in this study. The screen-printed electrode was fired using rapid thermal annealing and contacted by etching the passivation layer and forming Ag crystallites. In our previous study, we proposed a method for reducing this contact resistance from 5 to 1 m omega cm(2) by applying a current during the firing of a phosphorous-doped (P-doped) n(+) emitter in a p-type Si wafer without a silicon nitride (SiNx) passivation layer. According to the results, current application during the firing of Si solar cells should reduce the required firing temperature. Herein, a current (3 A) was applied between the screen-printed electrode and P-doped n(+) emitter in a p-type Si wafer with an SiNx passivation layer during low-temperature firing from 350 to 600 ?. The major effects of the proposed methods were a reduced contact resistance and enhanced of SiNx etching. Cross-sectional scanning electron microscopy images at different firing temperatures demonstrated that current injection during firing promoted the etching of the SiNx layer. Additionally, the method of current injection with low-temperature firing proposed in this work resulted in a device with a solar cell efficiency of 19.0%, which is similar to the efficiency of a reference cell fired at a higher temperature.
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Collections - Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL) > Department of Energy and Environment > 1. Journal Articles
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