| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 가을 (10/11 ~ 10/12, 창원컨벤션센터) |
| 권호 |
37권 2호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
On the Origin of the Photoinduced Interfacial Engineering in Inverted Polymer Solar Cells |
| 초록 |
We report the origin of the strong UV-irradiation dependence, generally known as a ‘light-soaking’ process, in inverted polymer solar cells (I-PSCs) using the interface of an sol-gel processed titanium sub-oxide (TiOx) and indium tin oxide (ITO) cathode. By using electrochemical impedance spectroscopy and by measuring the contact potential difference and transient photoconductivity of the TiOx layer, we found that the light-soaking process in I-PSCs originates from the photoinduced “rearrangement of the Fermi levels” at the sol-gel processed TiOx and ITO cathode interface together with trap sites existing in the TiOx layer. Based on our data, we optimized I-PSC devices with a high fill factor (FF) of ~ 70 %. |
| 저자 |
김정환1, 김근진1, 최유나1, 이종진1, 박성흠2, 이광희1
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| 소속 |
1광주과학기술원, 2부경대 |
| 키워드 |
Inverted polymer solar cells; light soaking; TiOx
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| E-Mail |
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