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인산농도와 레이저 강도에 따른 다결정실리콘 태양전지의 레이저 도핑연구
배상윤(Sangyoon Bae),배소익(Soik Bae),조영우(Youngwoo Jo),조영걸(Young-Gull Joh),이종훈(Jonghoon Yi) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
다결정실리콘태양전지의 효율을 증가시키기 위하여 레이저를 이용한 선택적 도핑방법을 시도하였다. 펄스 레이저를 이용하여 레이저 도핑을 하기 위한 특정 패턴을 만들었다. 패턴이 형성된 부분에 인산(H3PO4)을 도포하고 연속발진 레이저를 입사하여 표면을 열처리하여 인을 도핑하였다. 패턴이 형성된 부분의 표면형상은 전자주사현미경(SEM)으로 관찰하였고, 레이저의 세기에 따른 인산이 도핑된 깊이는 면저항 측정기(4 point probe)와 2차이온 질량분석기(SIMS)를 이용하여 분석하였다.
Kim, Hyuk Joon,Lee, Seul-Yi,Sinh, Le Hoang,Yeo, Chang Su,Son, Yeong Rae,Cho, Kang Rae,Song, YoonKyu,Ju, Sanghyun,Shin, Min Kyoon,Park, Soo-Jin,Park, SangYoon Elsevier 2017 Journal of Power Sources Vol.346 No.-
<P><B>Abstract</B></P> <P>Graphene has attracted widespread attention for supercapacitor applications thank to their excellent conductivity, mechanical flexibility, chemical stability and extremely high specific surface area. Here, all-graphene-oxide-supercapacitors were developed from two reduced graphene oxide (rGO) films as electrodes and one graphene oxide (GO) film as separator. The supercapacitors were then treated with 4M sulfuric acid at temperatures around 80 °C. By this treatment, the sulfuric acid molecules were physically intercalated into both rGO and GO films, which were confirmed by significant decrease intensity of characteristic peaks of sulfuric acid in Raman spectra. These sulfuric-acid-intercalated GO films can function as both quasi-solid-state electrolytes and separators. The average capacitance values measured at 100 mV s<SUP>−1</SUP> of the thermally wetted supercapacitor at 84 °C is improved 93.7 times higher than that of the as-prepared all-graphene-oxide-supercapacitor. The maximum capacitance of 266 F cm<SUP>−3</SUP> is obtained at scan rate 10 mV s<SUP>−1</SUP> for the thermally wetted supercapacitor at 84 °C. To the best of our knowledge, this is the highest specific capacitance that has ever been reported for a graphene oxide-based supercapacitor. Importantly, being in a quasi-solid-state, the energy storage performance of supercapacitors are persistent over several thousand cycles, making it very much unlike other carbon-based supercapacitors.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Quasi-solid-state all-graphene-oxide-supercapacitors were developed for the first time. </LI> <LI> Thermal wetting of the supercapacitors with H<SUB>2</SUB>SO<SUB>4</SUB> around 80 °C produces quasi-solid-state. </LI> <LI> A large volumetric capacitance of 266 F cm<SUP>−3</SUP> at a scan rate of 10 mV s<SUP>−1</SUP>. </LI> <LI> Energy storage performances of the supercapacitors are persistent over several thousand cycles. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>