TiO2 나노 입자의 크기와 결정 구조가 염료감응형 태양전지의 광전 효율에 미치는 영향

이현주; 박노국; 이태진; 한기보; 강미숙; Hyeonju Lee; No-Kuk Park; Tae Jin Lee; Gi Bo Han; Misook Kang

Clean Technology, Vol.19, No.1, 22-29, March, 2013

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TiO2 나노 입자의 크기와 결정 구조가 염료감응형 태양전지의 광전 효율에 미치는 영향

Effect of Particle Size and Structure of TiO2 Semiconductor on Photoelectronic Efficiency of Dye-sensitized Solar Cell

이현주, 박노국 ¹, 이태진 ¹, 한기보², 강미숙 ^†

영남대학교 화학과, 712-749 경북 경산시 대동 214-1
¹영남대학교 화학공학부, 712-749 경북 경산시 대동 214-1
²고등기술연구원 플랜트 엔지니어링 본부, 449-863 경기도 용인시 처인구 백암면 고안리 633-2

Hyeonju Lee, No-Kuk Park¹, Tae Jin Lee¹, Gi Bo Han², and Misook Kang^†

Department of Chemistry, Yeungnam University, 214-1 Dae-dong, Gyeongsan-si, Gyeongbuk 712-749, Korea
¹School of Chemical Engineering, Yeungnam University, 214-1 Dae-dong, Gyeongsan-si, Gyeongbuk 712-749, Korea
²Plant Engineering Division, Institute for Advanced Engineering, 633-2 Goan-ri, Baegam-myeon, Cheoin-gu, Yongin-si, Gyeonggi 449-863, Korea

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초록

본 연구는 염료감응형 태양전지의 구성요소 중 핵심 소재로 주목받고 있는 티타니아(TiO2) 나노입자의 크기와 결정구조에 따른 광전 효율을 비교하고자 하였다. 나노입자의 크기는 용매열법(solvothermal method)을 이용하여 출발 용액의 pH를 조절하고 결정구조의 차이는 솔-젤법에 의해 얻어진 무정형의 티타니아를 온도를 달리하여 소성함으로써 조절되었다. 그 결과, 용매법으로는 8.9, 12.8 그리고 20.2 nm의 크기를 가지는 세 종류의 아나타제 티타니아를, 솔-젤법으로는 세 종류의 아나 타제-루타일(anatase-rutile) 혼합결정구조를 가지는 티타니아를 얻었다. 여섯 종류의 샘플 중 20.2 nm 크기의 아나타제 결정구조의 티타니아를 광 전극으로 사용한 염료감응형 태양전지 단위 셀에서 8.6%로 가장 좋은 광전 효율을 얻었다.

A comparison of photo-efficiency on dye-sensitized solar cells (DSCs) assembled by using TiO2 materials with different structures and crystallite sizes were investigated in this study. The size and structure of TiO2 have been controlled by pHs and calcination temperatures using solvothermal and sol-gel methods, respectively. Six types of TiO2 samples are obtained; 8.9, 12.8, and 20.2 nm sized TiO2 particles, and the other types using sol-gel method were anatase-rutile mixtures on the structure. The highest photo-efficiency which is remarkable result reached to 8.6% over DSC assembled by anatase TiO2 with 20.2 nm particle size.

Keywords:Dye-sensitized solar cells;Nanometer sized TiO2;Anatase;Rutile

[References]

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Sae-Kung C, Vijitjunya P, Keawket S, Thanachayanont C, Heawchin A, Pungwiwu N, J. Micro. Soc. Thai., 24, 140 (2010)
Zhang YZ, Wu LH, Xie EQ, Duan HG, Han WH, Zhao JG, J. Power Sources, 189(2), 1256 (2009)
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Rehani BR, Joshi PB, lad KN, Pratap A, Indian J. Pure Ap. Phy., 44, 157 (2006)
Tayade RJ, Surolia PK, Kulkarni RG, Jasra RV, Sci. Technol. Adv. Mat., 8, 455 (2007)
Lai MH, Tubtimtae A, Lee MW, Wang GJ, Int. J. Photoenergy., 2010, 1 (2010)
Wu S, Han H, Tai Q, Zhang J, Xu S, Zhou C, Yang Y, Hu H, Chen B, Sebo B, Zhao XZ, Nanotechnol., 19, 1 (2008)
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[2] Xu H, Tao X, Wang DT, Zheng YZ, Chen JF, Electrochim. Acta, 55(7), 2280 (2010)

[3] Jorgensen M, Norrman K, Krebs FC, Sol. Energy Mater. Sol. Cells, 92(7), 686 (2008)

[4] Lenzman FO, Kroon JM, Adv. Opt., 2007, 1 (2007)

[5] Hinsch A, Behrens S, Berginc M, Bonnemann H, Brandt H, Drewitz A, Einsele F, Fassler D, Gerhard D, Gores H, Haag R, Herzig T, Himmler S, Khelashvili G, Eds., Prog. Photovoltaics., 16, 489 (2008)

[6] Gratzel M, J. Photochem. Photobiol. C., 4, 145 (2003)

[7] Sae-Kung C, Vijitjunya P, Keawket S, Thanachayanont C, Heawchin A, Pungwiwu N, J. Micro. Soc. Thai., 24, 140 (2010)

[8] Zhang YZ, Wu LH, Xie EQ, Duan HG, Han WH, Zhao JG, J. Power Sources, 189(2), 1256 (2009)

[9] Wei TC, Wan CC, Wang YY, Sol. Energy Mater. Sol. Cells, 91(20), 1892 (2007)

[10] Anpo M, Shima T, Kodama S, Kubokawa Y, J. Phys. Chem., 91, 4305 (1987)

[11] Li G, Richter CP, Milot RL, Cai L, Schmuttenmaer CA, Crabtree RH, Brudvig GW, Batista VS, Dalton Trans., 45, 10078 (2009)

[12] Kang SH, Kang MS, Kim HS, Kim JY, Chung YH, Smyri WH, Sung YE, J. Power Sources, 184(1), 331 (2008)

[13] Cplovicva M, Billik P, Cplovic L, Brezova V, Turani T, Plesch G, Fejdi P, Appl. Catal.B: Environ., 117-118, 224 (2012)

[14] Kheamrutai T, Pichet L, Boonlaer N, Nat. Sci., 42, 357 (2008)

[15] Rehani BR, Joshi PB, lad KN, Pratap A, Indian J. Pure Ap. Phy., 44, 157 (2006)

[16] Tayade RJ, Surolia PK, Kulkarni RG, Jasra RV, Sci. Technol. Adv. Mat., 8, 455 (2007)

[17] Lai MH, Tubtimtae A, Lee MW, Wang GJ, Int. J. Photoenergy., 2010, 1 (2010)

[18] Wu S, Han H, Tai Q, Zhang J, Xu S, Zhou C, Yang Y, Hu H, Chen B, Sebo B, Zhao XZ, Nanotechnol., 19, 1 (2008)

[19] Lee KM, Suryanarayanan V, Huang JH, Thomas KRJ, Lin JT, Ho KC, Electrochim. Acta, 54(16), 4123 (2009)