Fabrication of Cu2ZnSnSe4 thin film solar cell using sputtering technique and its characteristics스퍼터링법을 이용한 Cu2ZnSnSe4 태양전지 제작 및 특성

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Environmental harmless kesterite-related materials such as Cu2ZnSnSe4 (CZTSe), Cu2ZnSnS4 (CZTS) and Cu2ZnSn(S,Se)4 (CZTSSe) have attracted significant research interest due to their similar properties to Cu(In,Ga)Se2 (CIGS). Earth-abundant and non-toxic zinc and tin metals are the constituents in these materials. Controlled substitution of S with Se allows band gap tuning from approximately 1.5 to 1.0 eV, practically covering the optimal range for photovoltaic absorber similarly to indium-based chalcopyrites. Nowadays, the efficiency of the kesterite-based solar cell devices has reached over 10%, but their efficiencies have not yet reached the efficiency of CIGS (~20%).One key challenge of deposition processes is preparing single phase films, which is caused by the complex and incompletely understood nature of the multinary Cu-Zn-Sn-Se-S phase diagram. A second challenge of the CZTSe preparation is the process optimization involving the volatility upon heating of Sn materials, which makes composition control a challenge during film fabrication. Despite these challenges, successful film deposition and device fabrication has been demonstrates for the CZTS, CZTSe and CZTSSe absorbers and for vacuum and non-vacuum deposition approaches. The advantages of vacuum deposition methods are the high uniformity, delivery of precisely timed elemental fluxes. However, volatile elements and consequent reevaportaion from deposited films under vacuum conditions cause significant challenge. Non-vacuum deposition methods are particularly attractive for large-scale manufacturing due to their compatibility with high-throughput deposition techniques. However, incorporation of carbon, oxygen, and other impurities from the precursors or starting solution and the need for multistep processing are limitations.In this thesis, CZTSe thin films were fabricated by vacuum based sputtering and annealing. At first, precursors (Cu, Sn and ZnO) were deposited using sputtering at room temperatur...
Advisors
Woo, Seong-Ihlresearcher우성일
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2014
Identifier
568940/325007  / 020123597
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2014.2, [ vii, 75 p. ]

Keywords

Cu2ZnSnSe4; 산화아연; 스퍼터링; 태양전지; 박막; CZTSe; CZTSe; thin film; solar cell; sputtering; ZnO; Cu2ZnSnSe4

URI
http://hdl.handle.net/10203/196271
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=568940&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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