Rubrene:CuPc 정공 수송층이 도입된 p-i-n형 유기 박막 태양전지의 성능 특성 연구

강학수; 황종원; 강용수; 이혜현; 최영선; Hak-su Kang; Jongwon Hwang; Yongsu Kang; Hyehyun Lee; Youngson Choe

Korean Chemical Engineering Research, Vol.48, No.5, 654-659, October, 2010

Export Citation

Rubrene:CuPc 정공 수송층이 도입된 p-i-n형 유기 박막 태양전지의 성능 특성 연구

Performance Characteristics of p-i-n type Organic Thin-film Photovoltaic Cell with Rubrene:CuPc Hole Transport Layer

강학수, 황종원, 강용수, 이혜현, 최영선 ^†

부산대학교 화학공학과, 609-735 부산광역시 금정구 장전동 산 30

Hak-su Kang, Jongwon Hwang, Yongsu Kang, Hyehyun Lee, and Youngson Choe^†

Department of chemical Engineering, Pusan National University, Jangjeon-dong, Geumjeong-gu, Busan 609-735, Korea

E-mail:

초록

박막형 유기 태양전지의 효율 향상을 위하여 정공 수송층인 CuPc 층에 p형 유기 반도체인 rubrene을 함량 별로 도핑하여 ITO/PEDOT:PSS/CuPc: rubrene/CuPc:C60(blending ratio 1:1)/C60/BCP/Al의 이종접합구조를 가지는 p-i-n형 유기 박막형 태양전지 소자를 제조한 후, 유기 태양전지의 전류 밀도-전압(J-V) 특성, 단락 전류(Jsc), 개방 전압(Voc), 충진 인자(fill factor:FF), 에너지 전환 효율(ηe) 등을 측정하고 계산하여 성능 평가를 수행 하였다. 정공 수송층으로 사용된 CuPc 층에 rubrene을 도핑함으로써 에너지 흡수 스펙트럼에서 흡수 강도가 감소하였다. 그러나 CuPc 보다 큰 밴드갭을 가지며 높은 정공 이동도를 가지는 결정성 rubrene의 도핑에 의해 제조된 p-i-n형 유기 박막 태양전지의 성능은 향상 되는 것으로 확인되었다. 제조된 유기 태양전지의 에너지 전환 효율(ηe)은 1.41%로 실리콘 태양전지와 비교해서 아직도 성능 향상을 위한 많은 노력이 필요함을 보여 준다.

We have investigated the effect of rubrene-doped CuPc hole transport layer on the performance of p-i-n type bulk hetero-junction photovoltaic device with a structure of ITO/PEDOT:PSS/CuPc: rubrene/CuPc:C60(blending ratio 1:1)/C60/BCP/Al and have evaluated the current density-voltage(J-V) characteristics, short-circuit current(Jsc), open-circuit voltage(Voc), fill factor(FF), and energy conversion efficiency(ηe) of the device. By rubrene doping into CuPc hole transport layer, absorption intensity in absorption spectra decreased. However, the performance of p-i-n organic type bulk hetero-junction photovoltaic device fabricated with crystalline rubrene-doped CuPc was improved since rubrene shows higher bandgap and hole mobility compared to CuPc. Increased injection currents have effected on the performance improvement of the present device with energy conversion efficiency(ηe) of 1.41%, which is still lower value compared to silicone solar cell and many efforts should be made to improve organic photovoltaic devices.

Keywords:CuPc;Rubrene;Photovoltaic Cell;Energy Conversion Efficiency

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Kang HS, Park DW, Choe YS, Mol. Cryst. Liq. Cryst., 519, 252 (2010)

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[1] Barry PR, Jiangeng X, Soichi U, Stephen RF, J. Appl. Phys., 98, 124902 (2005)

[2] Jiangeng X, Barry PR, Soichi U, Stephen RF, J. Appl. Phys., 98, 124903 (2005)

[3] Sean ES, Christoph JB, Serdar S, Franz P, Thomas F, Jan CH, Appl. Phys. Lett., 78, 841 (2001)

[4] Schultes SM, Sullivan P, Heutz S, Sanderson BM, Jones TS, Mat. Sci. Eng. C., 25, 858 (2005)

[5] Drechsel J, Mannig B, Kozlowski F, Gebeyehu D, Thin Solid Films, 451, 515 (2004)

[6] Vibha T, Debjit D, Samal GS, Asha A, Satyendra K, J. Non-Cryst. Solids, 354, 2901 (2008)

[7] Gebeyehu D, Maennig B, Drechsel J, Leo K, Pfeiffer M, Sol. Energ. Mat. Sol. C., 79, 81 (2003)

[8] Park C, Seol J, Korean Chem. Eng. Res., 42(3), 269 (2004)

[9] Christoph JB, Jens AH, Pavel S, Christoph W, MRS Bull., 30, 50 (2005)

[10] Green MA, Silicon Solar Cells: Advanced Principles and Practice, Bridge Printery, Sydney (1995)

[11] Martin IH, et al, Science, 298, 981 (2002)

[12] Brabec CJ, Sariciftci NS, Hummelen JC, Adv. Funct. Mater., 11(1), 15 (2001)

[13] Peter P, Aharon Y, Stephen RF, J. Appl. Phys., 93, 3693 (2003)

[14] Gregg BA, J. Phys. Chem. B, 107(20), 4688 (2003)

[15] Xue JG, Rand BP, Uchida S, Forrest SR, Adv. Mater., 17(1), 66 (2005)

[16] Padinger F, Rittberger RS, Sariciftci NS, Adv. Funct. Mater., 13(1), 85 (2003)

[17] Dittmer JJ, Lazzaroni R, Leclere P, Moretti P, Granstrom M, Petritsch K, Marseglia EA, Friend RH, Bredas JL, Rost H, Holmes AB, Sol. Energy Mater. Sol. Cells, 61(1), 53 (2000)

[18] Geens W, Aernouts T, Poortmans J, Hadziioannou G, Thin Solid Films, 403, 438 (2002)

[19] Geens W, Sean ES, Bernhard W, Christoph JB, Jef P, Serdar S, Adv. Mater., 3, 105 (2002)

[20] Martens T, D’Haen J, Munters T, Beelen Z, Goris L, Manca J, D’Olieslaeger M, Vanderzande D, Schepper LD, Andriessen R, Synthetic Met., 138, 243 (2003)

[21] Drees M, Premaratne K, Graupner W, Heflin JR, Davis RM, Marciu D, Miller M, Appl. Phys. Lett., 81, 4607 (2002)

[22] Blochwitz J, Fritz T, Pfeiffer M, Leo K, Alloway DM, Lee PA, Armstrong NR, Org. Electron., 2, 97 (2001)

[23] Tetsuya T, Jun S, Toshihiro Y, Kazuhiro S, Sol. Energ. Mater. Sol. C., 93, 742 (2009)

[24] De Boer RWI, Gershenson ME, Morpurgo AF, Podzorov V, Phys. Status. Solidi. A., 201, 1302 (2004)

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

[26] Schon JH, Kloc Ch, Bucher E, Batlogg B, Nature, 403, 408 (2000)

[27] Kang HS, Park DW, Choe YS, Mol. Cryst. Liq. Cryst., 519, 252 (2010)