Journal of the Microelectronics and Packaging Society (마이크로전자및패키징학회지)

The Korean Microelectronics and Packaging Society (한국마이크로전자및패키징학회)
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Influence of Process Conditions on Properties of Cu2O Thin Films Grown by Electrodeposition

전착법을 이용한 Cu2O 박막 형성 및 공정 조건에 따른 특성 변화

  • Cho, Jae Yu (Department of Materials Science and Engineering, and Optoelectronics Convergence Research Center, Chonnam National University) ;
  • Ha, Jun Seok (Department of Advanced Chemicals and Engineering, and Optoelectronics Convergence Research Center, Chonnam National University) ;
  • Ryu, Sang-Wan (Department of Physics, and Optoelectronics Convergence Research Center, Chonnam National University) ;
  • Heo, Jaeyeong (Department of Materials Science and Engineering, and Optoelectronics Convergence Research Center, Chonnam National University)
  • 조재유 (전남대학교 신소재공학과) ;
  • 하준석 (전남대학교 응용화학공학부) ;
  • 류상완 (전남대학교 물리학과) ;
  • 허재영 (전남대학교 신소재공학과)
  • Received : 2017.06.14
  • Accepted : 2017.06.21
  • Published : 2017.06.30
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Abstract

Cuprous oxide ($Cu_2O$) is one of the potential candidates as an absorber layer in ultra-low-cost solar cells. $Cu_2O$ is highly desirable semiconducting oxide material for use in solar energy conversion due to its direct band gap ($E_g={\sim}2.1eV$) and high absorption coefficient that absorbs visible light of wavelength up to 650 nm. In addition, $Cu_2O$ has other several advantages such as non-toxicity, low cost and also can be prepared with simple and cheap methods on large scale. In this work, we deposited the $Cu_2O$ thin films by electrodeposition on gold coated $SiO_2/Si$ wafers. We changed the process conditions such as pH of the solution, applied potential on working electrode, and solution temperature. Finally, we confirmed the structural properties of the thin films by XRD and SEM.

$Cu_2O$는 초저가 태양전지의 흡수층으로 적용될 수 있는 물질 중 하나로 direct band gap($E_g={\sim}2.1eV$)을 갖고 있으며 최대 650 nm 파장의 빛을 흡수 할 수 있는 높은 흡수율을 가지고 있다. 또한 무독성, 풍부한 매장량으로 낮은 비용 등의 여러 장점을 가지며 간단하고 저렴한 방법으로 대량으로 제작이 가능하다. 본 연구에서 Au가 증착된 $SiO_2/Si$ 기판 위에 전착법을 통해 $Cu_2O$ 박막을 제작하였다. 우리는 용액의 pH와 작업전극에 인가되는 전위, 용액의 온도와 같은 공정조건을 바꾸어주었고 최종적으로 XRD와 SEM 사진 분석을 통해 박막의 특성을 확인하였다.

Keywords

References

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