abs

학술발표회초록보기

초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 09월 03일 23시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Bandgap tuning and XPS study of SnO2 quantum dots

등록일
2018년 8월 30일 16시 52분 28초
접수번호
2136
발표코드
MAT.P-475 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 18일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Material Chemistry
저자 및
공동저자
Bathula Babu
Mechanical Engineering, Yeungnam University, Korea
In the present study, we investigated the influence of annealing temperature on ultra-small SnO2 quantum dots (SQDs) prepared by a simple chemical reduction process. The structural and optical properties of annealed SQDs were systematically examined by different techniques. Our results show that the crystallinity and average crystallite size of annealed SQDs increased gradually with annealing temperature. The average crystallite size was maintained below 10 nm even for high annealing temperatures. XPS peak fitting analysis yielded information on the presence of mixed ionic states of Sn2+ and Sn4+ in SQDs and further revealed that the number of Sn2+ ions decreased at high temperature. Band-edge shifts were estimated from XPS data. It was possible to shift the bandgap of annealed SQDs from UV to the visible wavelength region, which is likely to have a beneficial impact on many applications of optoelectronic devices.

상단으로