Graphene Quantum Dot Layers with Energy-Down-Shift Effect on Crystalline-Silicon Solar Cells
- Authors
- Lee, Kyung D.; Park, Myung J.; Kim, Do-Yeon; Kim, Soo M.; Kang, Byungjun; Kim, Seongtak; Kim, Hyunho; Lee, Hae-Seok; Kang, Yoonmook; Yoon, Sam S.; Hong, Byung H.; Kim, Donghwan
- Issue Date
- 2-9월-2015
- Publisher
- AMER CHEMICAL SOC
- Keywords
- graphene quantum dots; silicon solar cells; GQD layers; energy-down-shift; light absorption
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.7, no.34, pp.19043 - 19049
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 7
- Number
- 34
- Start Page
- 19043
- End Page
- 19049
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/92508
- DOI
- 10.1021/acsami.5b03672
- ISSN
- 1944-8244
- Abstract
- Graphene quantum dot (GQD) layers were deposited as an energy-down-shift layer on crystalline-silicon solar cell surfaces by kinetic spraying of GQD suspensions. A supersonic air jet was used to accelerate the GQDs onto the surfaces. Here, we report the coating results on a silicon substrate and the GQDs' application as an energy-down-shift layer in crystalline-silicon solar cells, which enhanced the power conversion efficiency (PCE). GQD layers deposited at nozzle scan speeds of 40, 30, 20, and 10 mm/s were evaluated after they were used to fabricate crystalline-silicon solar cells; the results indicate that GQDs play an important role in increasing the optical absorptivity of the cells. The short-circuit current density was enhanced by about 2.94% (0.9 mA/cm(2)) at 30 mm/s. Compared to a reference device without a GQD energy-down-shift layer, the PCE of p-type silicon solar cells was improved by 2.7% (0.4 percentage points).
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- Appears in
Collections - Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL) > Department of Energy and Environment > 1. Journal Articles
- College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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