고분자 태양전지의 결정구조와 특성의 상관성

김정용; Jung Yong Kim

Korean Chemical Engineering Research, Vol.46, No.1, 88-93, February, 2008

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고분자 태양전지의 결정구조와 특성의 상관성

Correlation Between Crystal Structure and Properties in Polymer Solar Cells

김정용^†

미네소타대학교 화학공학과, 55455 미네소타주 미네아폴리스시 워싱턴가 421

Jung Yong Kim^†

Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Ave. SE, Minneapolis, MN 55455, United States

E-mail:

초록

지역규칙성 폴리3핵실티오펜과 용해성 플러렌 블렌드로 이루어진 벌크이종접합 고분자 태양전지를 제작하였다. 고분자 블렌드 필름에 대한 열처리 효과가 필름의 결정 구조와 자외선/가시광선 흡수스펙트럼에 주는 영향을 조사하였다. 그 후, 열처리에 의한 필름의 결정구조와 태양전지 효율의 상관관계를 연구하였다. 그 결과, 150 ℃에서 열처리한 필름이 분자간 상호작용 및 결정성측면에서 최적이었으며, 이 때, 고분자 태양전지의 에너지 전환 효율은 3.2 %이었다.

The bulk-heterojunction polymer solar cell based on regioregular P3HT (poly(3-hexylthiophene)) and PCBM (methanofullerene [6,6]-phenyl C61-butyric acid methyl ester) was fabricated. Annealing effects on the crystal structure of polymer.fullerene blends as well as the UV-VIS electronic absorption spectroscopy were investigated. The correlation between the crystal organization of bulk-heterojunction film and the power conversion efficiency of solar cell was studied. Resultantly, the polymer solar cell annealed on 150 ℃ for 30 min, showed both the enhanced molecular interactions and the optimized crystal structure and displayed the power conversion efficiency of 3.2 %.

Keywords:Buk-Heterojunction;Polymer Solar Cell;P3HT;PCBM;XRD

[References]

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[1] Sariciftci NS, Smilowitz L, Heeger AJ, Wudl F, Science, 258(5087), 1474 (1992)

[2] Yu G, Gao J, Hummelen JC, Wudl F, Heeger AJ, Science, 270(5243), 1789 (1995)

[3] Halls JJM, Walsh CA, Greenham NC, Marsegila EA, Friend RH, Moratti SC, Holmes AB, Science, 376, 498 (1995)

[4] Shaheen SE, Brabec CJ, Sariciftci NS, Padinger F, Fromherz T, Hummelen JC, Appl. Phys. Lett., 78, 814 (2001)

[5] Li G, Shrotriya V, Huang J, Yao Y, Moriarty T, Emery K, Yang Y, Nature Materials, 4, 864 (2005)

[6] Ma W, Yang C, Gong Y, Lee K, Heeger AJ, Adv. Funct. Mater., 15(10), 1617 (2005)

[7] Kim Y, Cook S, Tuladhar SM, Choulis SA, Nelson J, Durrant JR, Bradley DDC, Giles M, Mcculloch I, Ha CS, Ree M, Nat. Mater., 5, 197 (2006)

[8] Kim K, Liu J, Namboothiry MAG, Carroll DL, Appl. Phys. Lett., 90, 163511 (2007)

[9] Sirringhaus H, Brown PJ, Friend RH, Nelsen MM, Bechgaard K, Langeveld-Voss BMW, Spiering AJH, Jansseen RAJ, Meijer EW, Herwig P, de Leeu WDM, Science, 401, 685 (1999)

[10] Wu XM, Chen TA, Rieke RD, Macromolecules, 29(24), 7671 (1996)

[11] Hiemenz PC, Lodge TP, Polymer Chemistry, CRC Press, Taylor & Francis Group (2007)

[12] Kline RJ, McGehee MD, Toney MF, Nature Materials, 5, 222 (2006)

[13] Bard AJ, Faulkner LR, Electrochemical Methods: Fundamental and Applications, John Wiley & Sons, Inc. (2001)

[14] Yang X, Loos J, Vennstra SC, Verhees WJH, Wienk MM, Kroon JM, Michels MAJ, Janssen AJ, Nano Lett., 5(4), 579 (2005)

[15] Merlo JA, Frisbie CD, J. Polym. Sci. B: Polym. Phys., 41(21), 2674 (2003)

[16] Kim JY, Frisbie CD, unpublished results