我們利用電場調制光譜實驗研究並五苯(pentacene)薄膜結構系統，探討影響電光性質的機制。反射光譜經由電場調制之後，所獲得的調制譜圖有微分結構。藉由吸收譜圖和電場調制光譜的比較，我們可以得到並五苯的四個躍遷能量：1.85eV、1.97eV、2.12eV、2.28eV。藉由史達克效應(Stark effect)理論，我們可以建立微分結構模型來分析譜圖，微分結構模型所擬合的譜形和實驗譜形兩者形狀一樣。在電場調制光譜實驗中，我們分別改變調制電壓和直流偏壓，實驗結果符合史達克效應理論的預測，這表示並五苯樣品在外加電場的情況下，發生史達克效應，是史達克效應主導電場調制光譜的譜形結構。改變並五苯所處的環境溫度，將溫度從25K開始逐漸升高溫度時，調制光譜的光譜強度會隨著溫度升高而逐漸增加。當溫度逐漸接近250K時達到最大值，繼續增加溫度到300K，光譜強度反而變弱。

參考文獻
[1] F. Garnier, R. Hajlaoui, A. Yassar, and P. Srivastava, “All-Polymer Field-Effect Transistor Realized by Printing Techniques” ,Science, 265 ,1684(1994)
[2] H. Sirringhaus, T. Kawase, R. H. Friend, T. Shimoda, M. Inbasekaran, W. Wu, and E. P. Woo, “High-Resolution Inkjet Printing of All-Polymer Transistor Circuits”, Science 290, 2123-2126(2000)
[3] J. A. Rogers, Z. Bao, K. Baldwin, A. Dodabalapur, B. Crone, V. R. Raju, V. Kuck, H. Katz, K. Amundson, J. Ewing, and P. Drzaic, “Paper-like electronic displays: Large-area rubber-stamped plastic sheets of electronics and microencapsulated electrophoretic inks”, PNAS 98, 4835-4840(2001)
[4] C. K. Chiang, C. R. Fincher, Y. W. Park, A. J. Heeger, H. Shirakawa, E. J. Louis, S. C. Gau, and Alan G. MacDiarmid, “Electrical Conductivity in Doped Polyacetylene”, Phys. Rev. Lett. 39, 1098(1997)
[5] “有機薄膜電晶體”, 化合物半導體．光電技術（雜誌） No. 2, 2005/6
[6] 陳儒賢, “不同介電材料之表面能對pentacene複晶薄膜所產生之應力的研究”, 國立成功大學光電所(2005)
[7] J. L. Bredas, J. P. Calbert, D. A. da Silva Filho, and J. Cornil, “Organic semiconductors: A theoretical characterization of the basic parameters governing charge transport”, PNAS, Vol.99, No.9, 30 Aprill 2002
[8] Gerlinck, Gerwin H, Huitema, Edzer A, et al. “Flexible active-matrix displays and shift registers based on solution-processed organic transistors”, Nature Materials, 2004,3(2): 106-110
[9] Wenge Guo, “Electroabsorption Spectroscopy of Quasi-One-dimensional Organic Molecular Crystals”, Dresden(2003)
[10] R.farchioni and G. Grosso(Eds.), “Organic Electronic Materials – Conjugated Polymers and Low Molecular Weight Organic Solids”, Springer(2001)
[11] R.E. Merrifield, “Ionized states in one-dimensional molecular crystal”, J. Chem. Phys. 34,1835(1961)
[12] P. Petelenz, “Theoretical Models for Electroabsorption Spectroscopy of Organic Molecular Crystals”, Lecture Series on Computer and Computational Sciences Vol.6(2006)
[13] P. Petelenz, “Theoretical models for electro-absorption spectroscopy”, Organic Electronics 5, 115-127(2004)
[14] P. Petelenz, Michal Slawik, Kohei Yokoi, and Marek Z. Zgierski, “Theoretical calculation of the electroabsorption spectra of polyacene crystals”, J. Chem. Phys. 105(11),15 September 1996
[15] Michal Slawik and P. Petelenz, “Theoretical interpretation of the electroabsorption spectra of polyacene crystal. Ⅰ. Role of Frenkel states”, J. Chem. Phys. 107(18), 8 November 1997
[16] Michal Slawik and P. Petelenz, “Theoretical interpretation of the electroabsorption spectra of polyacene crystal. Ⅱ. Role of charge-transfer states”, J. Chem. Phys. 111(16), 22 October 1999
[17] Gerold U. Bublitz and Steven G. Boxer, “Stark Spectroscopy : Applications in Chemistry, Biology, and Materials Science”, Annu. Rev. Phys. Chem. 48:213-42(1997)
[18] 沈學礎, “半導體光學性質”, 科學出版社(1992)
[19] Singh, and Jasprit, “Electoronic and optoelectronic properties of semiconductor structures”, Cambridge, New York, p.345 (2003)
[20] J. J. Sakurai, “Modern Quantum Mechanics”, Addison-Wesley, p.332(1994)
[21] 蔡聖善, 朱耘, “古典電動力學”, 凡異出版社, 1998, P.289
[22] Robert Nitsche, “Optical properties of organic semiconductors : From (Sub-)monolayers to Crystalline films”, Dresden(2005)
[23] B. O. Seraphin, “The effect of Electric Field on Reflectivity Hulin”, Academic, Duuod, Paris(1964)
[24] Raymond Chang, “Physical Chemistry for the Biosciences”, Ch.14, University Science Books(2005)
[25] D. E. Aspnes, “Third-derivative Modulation Spectroscopy With Low-field Electroreflectance”, Surface Science 37, p.418-p.442(1973)
[26] M. Leone, A. Paoletti, and N. Robotti, “A Simultaneous Discovery: The Case of Johannes Stark and Antonino Lo Surdo”, Physics in Perspective, vol. 6, pp. 271-294 (2004)
[27] P. S. Epstein, “The Stark Effect from the Point of View of Schroedinger's Quantum Theory”, Physical Review, Vol.28, pp. 695-710 (1926)
[28] David J. Griffths, “Introduction to electrodynamics (third Edition)”, Prentice Hall International Editions(1999)
[29] M. Bauer, and L. Kador, “Electric-field effect of two-level systems observed with single-molecular spectroscopy”, J. Chem. Phys. Vol.118, No.20, 22 May 2003
[30] E. V. Tsiper, and Z. G. Soos, “Electronic polarization in pentacene crystals and thin films”, Phys. Rev. B68, 085301(2003)
[31] T.W. Kelley, D. V. Muyres, P. F. Baude, T. P. Smith, and T. D. Jones, Mater. Res. Soc. Symp. Proc. 771, 169(2003)
[32] Rector Magnificns, and D. F. J. Bosscher(Dr.), “polymorphism and electronic properties of pentacene”, Ph.D.(2002)
[33] M. liess, S. Jeglinski, Z. V. Vardeny, M. Ozaki, K. Yoshino, Y. Ding, and T. Barton, “Electroabsorption spectroscopy of luminescent and nonluminescent π-conjugated polymers”, Phys. Rev. B Vol.56, No.24, 15 December 1997
[34] Donald A. Neamen, “Semiconductor Physics and Devices : Basic Principle”, 3rd ed. , McGraw-Hill(2003)
[35] S. P. Park, S. S. Kim, J. H. Kim, C. N. Wang, and S. Im, “Optical and luminescence characteristics of thermally evaporated pentacene films on Si”, Appl. Phys. Lett. Vol.80, NO.16, 22 April 2002
[36] Jiyoul Lee, S.S. Kim, Kibum Kim, Jae Hoon Kim, and Seongil, “Correlation between photoelectric and optical absorption spectra of thermally evaporated pentacene films”, Appl. Phys. Lett. Vol.84, No.10, 8 March 2004
[37] Jiyoul Lee, D. K. Hwang, C. H. Park, S. S. Kim, and Seongil Im, “Pentacene-based photodiode with Schottky junction”, Thin Solid Films 451-452(2004) 12-15
[38] K. Kim, Y. K. Yoon, M. –O. Mun, S. P. Park, S. S. Kim, S. Im, and J. H. Kim, “Optical Properties of Solid pentacene”, Journal of Superconductor : Incorporating Novel Magnetism, Vol.15, No.6, December 2002
[39] Rui He, Nancy G. Tassi, Graciela B. Blanchet, and Aron Pinczuk, “Fundamental optical recombination in pentacene clusters and ultrathin films”, Appl. Phys. Lett. 87 103107(2005)
[40] S. S. Kim, S. P. Park, J. H. Kim, and S. Im, “Photoelectric and optical properties of pentacene films deposited on n-Si by thermal evaporation”, Thin Solid Films 420-421(2002) 19-22
[41] Daniel Faltermeier, Bruno Gompf, Martin Dressel, Ashutosh K. Thipathi, and Jens Pflaum, “Optical properties of pentacene thin films and single crystals”, Phys. Rev. B74, 125416(2006)
[42] Murilo L. Tiago, John E. Northrup, and Steven G. Louie, “Ab inito calculation of the electronic and optical properties of solid pentacene”, Phys. Rev. B67, 115212(2003)