A study on multi-junction silicon thin film solar cells employing n doped SiO:H-based and modified a-Si:H-based layers = n형 실리콘 옥사이드 기반 박막과 개선된 비정질 실리콘 기반 박막을 이용한 적층형 실리콘 박막 태양전지에 관한 연구

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 351
  • Download : 0
Si based materials are several advantages for thin films solar cells: adjustable band gap, well-developed fabrication techniques, multi-junction device capability-which maximized the utilization of the solar spectrum. But the limitation of low absorption coefficient of Si based materials, the researches of optimization of intrinsic layer and efficient light trapping are critical in the field of thin-film silicon solar cells for a high efficiency, low cost and enhancement of stability of device. In this thesis, I optimized a-Si:H and a-SiGe:H layer for top and middle cells in multi-junction thin film solar cells, and prepared n-uc-SiO:H layers for interlayer of multi-junction dells and back reflector for uc-Si:H bottom cells. Chapter 1 introduces basic knowledge in thin film solar cell that includes the electrical optical properties of intrinsic layers, characterization tools for solar cells. Chapter 2-5 shows experimental results for this dissertation. In Chapter 2, we have optimized the top cell performance by lowing a band-gap of intrinsic layer and introducing intrinsic buffer layer for the high efficiency of tandem sola cell. The intrinsic buffer layer improved not only Voc (from 0.87V to 0.89V) but also Jsc (10.8 mA/cm2 to 11.82 mA/cm2) compared the without buffer layer. By further optimization of the p-layer thickness, we could achieve the initial conversion efficiency of 7.81 % with Jsc of 11.91 mA/cm2 in the thickness of intrinsic absorb layer of 250nm. With this result, we try to achieve higher conversion efficiency of tandem solar cell with the proper current matching condition In chapter 3, we have improved the tandem cell performance by introducing n-uc-SiO:H interlayer and optimized top cell. The n-uc-SiO:H interlayer is investigated on electrical structural measurements. The n-uc-SiO:H of conductivity - 10-3S/cm was used in tandem solar cell as an interlayer and we confirmed the conductivity of 10-5S/cm is available as the interlayer. We achieve...
Advisors
Park, O-Okresearcher박오옥
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2012
Identifier
567292/325007  / 020065158
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2012.8, [ xi, 105 p. ]

Keywords

Si thin film solar cell; 3중 접합 태양전지; 후면 반사층; 중간 반사층; 2중 적층형 태양전지; n형 실리콘 옥사이드 기반 박막; a-Si:H; tandem; a-SiGe:H; n-μc-SiO:H; interlayer; back reflector; triple junction; 실리콘 박막 태양 전지; 비정질 실리콘 태양전지; 비정질 실리콘 게르마늄 태양전지

URI
http://hdl.handle.net/10203/196370
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=567292&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0