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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국진공학회(ASCT) Applied Science and Convergence Technology Applied Science and Convergence Technology Vol.31 No.5
- 발행연도
- 2022.9
- 수록면
- 116 - 119 (4page)
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TiO₂ thin film typically used as an electron transport layer (ETL) in perovskite solar cells has many advantages such as high refractive index, good photocatalytic properties, excellent chemical stability, and low cost. TiO₂ thin films are typically formed by a solution process, but it is difficult to achieve large area coating, accurate thickness control, and mass production with this process. Here, we demonstrated that radiofrequency (RF)-sputtered TiO₂ is an effective replacement for use as the ETL for the perovskite solar cells in order to overcome the disadvantages of the solution process. The TiO₂ layer was deposited on the substrate by reactive sputtering (RS) with a high-purity Ti metal target. The RFRS TiO₂ thin film was systematically characterized and compared with spin-coated TiO₂ by means of various analytical techniques. The transmittance of 20-nm-thick as-deposited TiO₂ on an indium tin oxide (ITO)-coated glass substrate was 75−80 % in the visible range. After annealing, the amorphous phase was converted into an anatase structure in RFRS TiO₂. In the case of the spin-coated TiO₂ layer, indium diffusion from the ITO layer and an increase in sheet resistance with the annealing temperature were observed. On the other hand, the RFRS TiO₂ had a denser and more uniform surface, and it could be annealed at a lower temperature. Therefore, it was able to block indium diffusion and increase the 𝑉OC and FF values. Finally, the device efficiency of the perovskite solar cell was improved from 16.04 to 17.46 % when using RFRS TiO₂ as the ETL.
목차
ABSTRACT
1. Introduction
2. Experimental details
3. Results and discussion
4. Conclusions
References
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