Enhancement of the power conversion efficiency of inverted organic photovoltaic cells with a nanoscale Ga-doped ZnO electron buffer layer
- Title
- Enhancement of the power conversion efficiency of inverted organic photovoltaic cells with a nanoscale Ga-doped ZnO electron buffer layer
- Author
- 김태환
- Keywords
- Organic photovoltaics; Inverted structure; Electron buffer layer; Ga-doped ZnO; Solution-process
- Issue Date
- 2014-10
- Publisher
- HANYANG UNIVERSITY PRESS
- Citation
- JOURNAL OF CERAMIC PROCESSING RESEARCH; 2014, 15 5, p347-p350, 4p.
- Abstract
- Inverted organic photovoltaic (OPV) cells containing various concentration of Ga-doped ZnO (GZO) as an electron buffer layer (EBL) were deposited by using a solution-process to enhance their power conversion efficiency (PCE). Atomic force microscopy (AFM) images showed that the measured root mean square roughnesses of 0, 5, and 10% GZO EBL were approximately 11.2, 2.3, and 4.6 nm, respectively, and that the 5% GZO EBL have very smooth surface morphology. The optical transmittance of the 5% GZO thin films in the wavelength range between 300 and 800 nm is 88% higher than those of GZO EBLs. X-ray photoelectron spectroscopy (XPS) measurement was investigated to confirm the valence state of Zn, Ga, and O in the GZO EBL. Current density-voltage (J-V) results showed the highest PCE of the device of the fabricated inverted OPV cells utilizing 5% GZO with 2.61%. The enhancement in the PCE of inverted OPV cells were attributed to an enhancement of the surface smoothness and the modification of the work function of the GZO EBL.
- URI
- http://jcpr.kbs-lab.co.kr/file/JCPR_vol.15_2014/JCPR15-5/_162013-154_347-350.pdfhttps://repository.hanyang.ac.kr/handle/20.500.11754/70901
- ISSN
- 1229-9162
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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