Photonic sintering of a ZnO nanosheet photoanode using flash white light combined with deep UV irradiation for dye-sensitized solar cellsopen access
- Authors
- Patil, Supriya A.; Hwang, Hyun-Jun; Yu, Myeong-Hyeon; Shrestha, Nabeen K.; Kim, Hak-Sung
- Issue Date
- Jan-2017
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.7, no.11, pp.6565 - 6573
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 7
- Number
- 11
- Start Page
- 6565
- End Page
- 6573
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/21240
- DOI
- 10.1039/c6ra26815c
- ISSN
- 2046-2069
- Abstract
- The present report details research work on the photonic sintering of ZnO nanosheets (ZnO NSs), which were synthesized via a solid-state synthesis method. The sintering was performed using flash white light (FWL) combined with deep UV irradiation (photonic sintering) under ambient conditions at ultra-high speed, which is a superior process over the conventional thermal-sintering process. Furthermore, the application of this method was demonstrated in dye-sensitized-solar cells (DSSCs), where a power conversion efficiency (PCE) of 2.9% was achieved when the photoanode was annealed using photonic sintering with a FWL of 20 J cm(-2) combined with deep UV irradiation of 30 mW cm(-2) irradiation power. This PCE is higher than that of the pristine ZnO NSs (PCE-1.5%) and of the thermally sintered ZnO NS photoanode (PCE = 2.0%). The superior performance of the dye cell with the photonic-sintered ZnO NSs is attributed to the better interconnection, higher effective electron diffusion coefficient (D-n), higher electron diffusion length (L-n) and a higher amount of dye loading than that of the pristine ZnO NS photoanode. The improved PCE suggests that the photonic-sintering method, as well as being extremely simple, is highly effective and enables a fast annealing for photoanodes in DSSCs and could be particularly beneficial for low-temperature-based solar cells.
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