本論文係利用醯氨鈉(NaNH2)摻雜及銅酞菁(CuPC)摻雜五環素(Pentacene)研製P-N-N+五環素有機太陽能電池結構ITO/PEDOT:PSS/Pentacene/Pentacene:(X%)NaNH2/pentacene:(Y%)CuPC/BCP/Alq3/Al。研究改變醯氨鈉及銅酞菁摻雜的重量百分比對太陽能電池特性的影響並找出元件最佳化的摻雜比率。為了提升元件特性，吾人在陰極與有機層中間加入BCP電洞阻擋層及Alq3電子傳輸層來分別減少漏電流及降低電子傳輸的表面能障；銅酞菁(CuPC)摻雜增加元件對紫對外光(300~400nm)及可見光(500~700nm)的吸收強度。
吾人發現所發展出來的五環素有機太陽能電池在加入NaNH2摻雜濃度為3000%時，元件載子濃度可達1.25x1016cm-3，此時元件結構具有最佳的光/暗電流比，對可見光增益約為22。如再加入75%的CuPC摻雜濃度時，元件有最大可見光增益約191。利用此新結構成長出的太陽能電池在AM1.5G模擬太陽光照射下，得到的主要特性為Voc=1.1V，Jsc=0.3mA/cm2，FF=30.3%，η=0.1%。

In this research, we co-evaporate NaNH2 and CuPC with intrinsic pentacene (normally a p- type) to form P-N-N+ pentacene based organic solar cell structure: ITO/PEDOT:PSS/pentacene/pentacene:(X%)NaNH2 /pentacene:(Y%)CuPC/BCP/Alq3/Al. We investigate the effects of changing the weight ratio of the NaNH2 and CuPC on photovoltaic cell performance. To promote cell performance, both BCP(hole blocking layer) and Alq3(electron transporting layer) are added. The CuPC doping layer, acting as N+ layer, is added owing to the high absorption to UV spectrum (300~400nm) and visible spectrum (500~700nm).
Initially, when NaNH2 doping concentration is 3000%, we get photo/dark current ratio of 22, and the measured electron density is up to 1.25x1016 cm-3. Then adding 75% CuPC doping layer, we get the highest photo/dark current ratio of 191.
With the optimized doping concentration, the main properties of the pentacene based organic solar cell under irradiance of AM1.5G sun spectrum simulator are Voc=1.1V, Jsc=0.3mA/cm2, FF=30.3%, and η=0.1%.

[1] D. M. Chapin, C. C. Fuller, G. L. Person, “A new Silicon p-n junction photocell for converting solar radiation into electrical power”, Applied Physics 25: 676-677, 1954.
[2] D. Kearns, M. Calvin, “Photovoltaic effect and photoconductivity in laminated organic systems” , J. Chem. Phys. 29, 950-951 (1958)
[3] C. W. Tang, “Two-layer organic photovoltaic cell”, Appl. Phys. Lett., 48,183 (1986)
[4] S. E. Shaheen, R. Radspinner, N. Peyghambarian, G. E. Jabbour, ”Fabrication of bulk heterojunction plastic solar cell by screen printing”, Appl. Phys. Lett., 79, pp.2996-2998(2001).
[5] J. Bharathan, and Y. Yang, “Polymer electroluminescent devices processed by inkjet printing: I. Polymer light-emitting logo”, Appl. Phys. Lett., 72, 2660 (May, 1998).
[6] C. J. Brabec, F. Padinger, J. C. Hummelen, R. A. Janssen, and N. S. Saricifrtci, “Realization of large area flexible fullerene-conjugated polymer photocells: A route to plastic solar cells,” Synth. Met. 102, 861 (1999).
[7] Thomas Surek ,“Crystal growth and materials research in photovoltaics: progress and challenges “Journal of Crystal Growth, Volume 275, Issues 1-2, 15 February 2005, Pages292-304
[8] 莊嘉琛編譯,”太陽能工程(太陽電池篇)”,全華科技圖書股份有限公司,台灣(2002)
[9] Donald A.Neamean, “Semiconductor Physics and Devices”, McGraw-Hill, New York(1997).
[10] 林明憲編著,”太陽電池技術入門”,全華科技圖書股份有限公司,台灣(2007)
[11] 陳文豪,潘俊宏,周玉蟇, “共軛高分子太陽能電池”,化學季刊,第六十七卷第一期,p61,中華民國九十八年
[12] J. J. M. Halls, K. Pichler, R. H. Friend, S. C. Morattiand A. B. olmes ”Exciton diffusion and dissocia-tion in a PPV/C60 heterojunction photovoltaic cell”Appl.Phys.Lett. 68, 3120-3122 (1996)
[13] S.Naga,M. Tamekawa,T. Terashita, H. Okada, H. Anada, H. Onnagawa, Synth.Met. 91,129(1997).
[14] T. Ishida,H. Kobayashi, Y. Nakato, ”Structures and properties of electron-beam-evaporated indium tin oxide films as studied by x-ray photoelectron spectroscopy and work-function measurements”, J.Appl. Phys. 73,4344(1993).
[15] S. K. So, W. K.Choi, C.H. Cheng, L. M.Leung, C.F.Kwong,” Surface preparation and characterization of indium tin oxide substrates for organic electroluminescent devices”, Appl. Phys. A,68,447(1999).
[16] S. A. VanSlyke, C.H. Chen, C.W.Tang, ”Organic electroluminescent devices with improved stability“, Appl. Phys. Lett. 69, 2160 (1996).
[17] C. K. Chiang, S. C. Gau, C. R. Fincher, Jr., Y. W. Park, A. G. MacDiarmid, and A. J. Heeger, “Polyacetylene, (Ch)x: N-type and p-type doping and compensation”, Appl. Phys. Lett. Vol.33, PP.18-20 (1978).
[18] T. Wakimoto, Y, Fukuda, K. Nagayama, A. Yokoi, H. Nakada, M. Tsuchida, “Organic EL Cells Using Alkaline Metal Compounds as Electron Injection Materials”, IEEE Trans. Electron. Devices , vol. 44, NO. 8, PP.1245-1248, (1997)
[19] C. Ganzorig, M. Fujihira, “Evidence for alkali metal formation at a cathode interface of organic electroluminescent devices by thermal decomposition of alkali metal carboxylates during their vapor deposition”, Appl. Phys. Lett. vol.85, PP.4774-4776,(2001).
[20] J. Kido, T. Matsumoto , “Bright organic electroluminescent devices having a metal-doped electron-injecting layer”, Appl. Phys. Lett. vol. 73, PP.2866-2868,(1998).
[21] H. Hoppe, and N. S. Sariciftci, “ Organic solar cells: An overview,” J. Mater. Res. 19, 1924 (2004).
[22] Martin A. Green, “Solar Cells Operating Principles, Technology, and System Application” P4-6&P85-96, University of New South Wales Press (1982)
[23] M.P Thekackra, “The Solar Cell Constant and Solar Spectrum Measurement from a Reasearch Airecraft,” NASA Technical Report.
[24] 陳金鑫，黃孝文，”有機電激發光材料與元件”，五南圖書出版公司, (2006).
[25] Y. Terao, H. Sasabe, C. Adachi, “Correlation of hole mobility, exciton diffusion length, and solar cell characteristics in phthalocyanine/ fullerene organic solar cells”, Appl. Phys. Lett., 90, 103515（2007）.
[26] P. Peumans and S. R. Forrest, “Very-high-efficiency double-heterostructure copper phthalocyanine/C60 photovoltaic cells”, Appl. Phys. Lett., 79, 126 (2001).
[27] D. Yoshimura , T. Yokoyama , E Ito b, H. Ishii , Y. Ouchi, S. Hasegawa, and K. Seki, “Electronic structure of Alq3/LiF/Al interfaces studied by UV photoemission”, Synthetic Metals 102( 1999) 1145-1146
[28] L.Y.Lin, S. S. Lee, K.S. J. Pister, and M.C. Wu, “ Self-aligned hybrid integration of semiconductor lasers with micromachined micro-optics for optoelectronic packaging”, Appl. Phys. Lett. 66 ( 22 ), 29 May (1995)