Please wait a minute...
Chin. Phys. B, 2011, Vol. 20(1): 017202    DOI: 10.1088/1674-1056/20/1/017202
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Detailed analysis of ultrathin fluorescent red dye interlayer for organic photovoltaic cells

Zang Yue(臧月),Yu Jun-Sheng(于军胜), Wang Na-Na(王娜娜),and Jiang Ya-Dong(蒋亚东)
State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China
Abstract  The influence of an ultrathin 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) fluorescent dye layer at donor/acceptor heterojunction on the performance of small-molecule organic photovoltaic (OPV) cell is studied. The structure of OPV cell is of indium-tin oxide (ITO)/copper phthalocyanine (CuPc)/DCJTB/fullerene (C60)/bathophenanthroline (Bphen)/Ag. The results show that open circuit voltage (VOC) increases to 0.57 V as the film thickness of DCJTB layer increases from 0.2 to 2.0 nm. By using an equivalent circuit model, the enhancement of VOC is found to be attributed to the reduced reverse saturation current density (JS) which is due to the lower highest occupied molecular orbital (HOMO) level in DCJTB than that in CuPc. Also, the short circuit current density (JSC) is affected when the DCJTB layer becomes thicker, resulting from the high series resistance RSA due to the low charge carrier mobility of fluorescent red dye.
Keywords:  organic photovoltaic (OPV) cells      DCJTB      interlayer thickness      ultrathin red dye  
Received:  28 July 2010      Revised:  24 August 2010      Accepted manuscript online: 
PACS:  72.40.+w (Photoconduction and photovoltaic effects)  
  73.40.Lq (Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions)  
  79.60.Jv (Interfaces; heterostructures; nanostructures)  
Fund: Project partially supported by the National Natural Science Foundation of China (NNSFC) (Grant Nos. 60736005 and 60425101-1), the Foundation for Innovative Research Groups of the NNSFC (Grant No. 60721001), the Research Fund for the Dectoral Program of Higher Education (RFDP) (Grant No. 20090185110020), the Program for New Century Excellent Talents in University, China (Grant No. NCET-06-0812), the Scientific Research Foundation for Returned Overseas Chinese Scholars, State Education Ministry (Grant No. GGRYJJ08-05), and the Young Excellence Project of Sichuan Province, China (Grant No. 09ZQ026-074).

Cite this article: 

Zang Yue(臧月), Yu Jun-Sheng(于军胜), Wang Na-Na(王娜娜), and Jiang Ya-Dong(蒋亚东) Detailed analysis of ultrathin fluorescent red dye interlayer for organic photovoltaic cells 2011 Chin. Phys. B 20 017202

[1] Kim J Y, Lee K, Coates N E, Moses D, Nguyen T Q, Dante M and Heeger A J 2007 Science 317 222
[2] Kippelen B and Bredas J L 2009 Energy Environ. Sci. 2 251
[3] Yu J S, Huang J, Zhang L and Jiang Y D 2009 J. Appl. Phys. 106 063103
[4] Gilot J, Wienk M M and Janssen R A J 2010 Adv. Mater. 22 E67
[5] Sista S, Hong Z, Park M H, Xu Z and Yang Y 2010 Adv. Mater. 22 E77
[6] Wang N N, Yu J S, Zang Y, Huang J and Jiang Y D 2010 Chin. Phys. B 19 038602
[7] Wang N N, Yu J S, Zang Y, Huang J and Jiang Y D 2010 Sol. Energy Mater. Sol. Cells 94 263
[8] Chan M Y, Lai S L, Fung M K, Lee C S and Lee S T 2007 Appl. Phys. Lett. 90 023504
[9] Chen H Y, Hou J H, Zhang S Q, Liang Y Y, Yang G W, Yang Y, Yu L P, Wu Y and Li G 2009 Nature Photon. 3 649
[10] Xie W F and Liu S Y 2006 Semicond. Sci. Technol. 21 316
[11] Kinoshita Y, Hasobe T and Murata H 2007 Appl. Phys. Lett. 91 083518
[12] Wang N N, Yu J S, Lin H and Jiang Y D 2010 Chin. J. Chem. Phys. 23 84
[13] Kumar A, Sista S and Yang Y 2009 J. Appl. Phys. 105 094512
[14] Fahrenbruch A L and Aranovich J 1979 Solar Energy Conversion (New York: Spinger-Verlag) p257
[15] Chu C W, Shrotriya V, Li G and Yang Y 2006 Appl. Phys. Lett. 88 153504
[16] Xue J G, Uchida S, Rand B P and Forrest S R 2004 Appl. Phys. Lett. 84 3013
[17] Lai S L, Lo M F, Chan M Y, Lee C S and Lee S T 2009 Appl. Phys. Lett. 95 153303
[18] Servaites B J, Yeganeh S, Marks T J and Ratner M A 2010 Adv. Funct. Mater. 20 97
[1] Photocurrent analysis of organic photovoltaic cells based on CuPc/C60 with Alq3 as a buffer layer
Wang Na-Na(王娜娜), Yu Jun-Sheng(于军胜), Zang Yue(臧月), and Jiang Ya-Dong(蒋亚东). Chin. Phys. B, 2010, 19(3): 038602.
No Suggested Reading articles found!