서지주요정보
$SrTiO_3$ 광전극의 반도성 및 광전기화학 성질에 관한 연구 = Studies on the semiconductive and photoelectrochemical properties of $SrTiO_3$ photoelectrode
서명 / 저자 $SrTiO_3$ 광전극의 반도성 및 광전기화학 성질에 관한 연구 = Studies on the semiconductive and photoelectrochemical properties of $SrTiO_3$ photoelectrode / 현상무.
발행사항 [대전 : 한국과학기술원, 1990].
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소장정보

등록번호

8001752

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 9036

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

The semiconductive and photoelectrochemical properties of reduced polycrystalline $SrTiO_3$ electrode have been studied in 1 N NaOH solution by using AC impedance and potentiodynamic techniques. The compacted $SrTiO_3$ powder were sintered for 6 h at 1400℃, and then reduced for 2 h at the temperature range of 800℃ to 1200℃ under hydrogen atmosphere. The AC impedance measurements were carried out by superimposing an AC voltage of 5 mV amplitude on a DC bias of-2000 to $1000mV_{SCE}$ over a frequency range of 5 to 10000Hz. The equivalent circuit is found to consist of a series connection of a parallel RC circuit of electrode/electrolyte interface and a total resistance of the electrolyte and the electrode from Bode and admittance plots. The capacitance decreased with increasing applied potential and frequency. The donor concentration $N_d$ of the electrode increased from $2.3×10^{18}$ to $2.2×10^{19}cm^{-3}$ with increasing reduction temperature from 800℃ to 1200℃. The flat-band potential $V_{fb}$ was found to be about 1376 to $1468mV_{SCE}$. The effects of frequency and applied potential on the semiconductive properties of $SrTiO_3$ electrodes were discussed in term of the change of donor concentration. The on-set potential at which the photocurrent begin to occur, appeared to shift toward flat-band potential with increasing light intensity.

서지기타정보

서지기타정보
청구기호 {MMS 9036
형태사항 iii, 45 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sang-Moo Hyun
지도교수의 한글표기 : 변수일
지도교수의 영문표기 : Su-Il Pyun
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 24-26
주제 Semiconductors.
스트론튬. --과학기술용어시소러스
반도성. --과학기술용어시소러스
광전기 화학. --과학기술용어시소러스
Photoelectrochemical propecties
Strontium titanates
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