在本篇論文中，我們以帶有不同尾端官能基之自組裝單分子薄膜，分別修飾染料敏化太陽能電池二氧化鈦工作電極中FTO/TiO2介面與TiO2/電解液介面，並利用自組裝單分子薄膜能改變功函數，表面偶極矩及親疏水性之特性對元件之各參數進行探討。
而對於TiO2/電解液界面方面，吾人藉由改變二氧化鈦電極功函數之方式，成功地改變了電子注入電極之能障，進而使開環電壓(Voc)產生變化，此外，成長於二氧化鈦表面所改變之偶極矩也影響了電解液電子導入二氧化鈦電極表面吸附的料之速率，進而影響短路電流(Jsc)，在最佳化方面，使用3-(Triethoxysilyl)propionitril成長於二氧化鈦電極表面，可利用其功函數較低之優點，成功使開環電壓由0.77V提升至0.79V。在短路電流方面，其偏正偶極之特性也促使電子移向二氧化鈦電極之速率增加，驅使電解以中電子對染料進行填補電洞速率上升，進而使短路電流些微提升，使元件光電轉換效率由7.64%提升至8.03%。
而在FTO/TiO2介面方面，我們則利用具有羧酸基尾端官能基之自組裝單分子薄膜，改變表面親疏水性，進而提升二氧化鈦電極與FTO基板之接觸程度及其初始層緻密程度，降低了FTO/TiO2介面之電阻，提升工作電極載子遷移率，因而提升短路電流，使光電轉換效率上升。

In this work, we demonstrated the self-assembled monolayers (SAMs) assisted improvement of the efficiency of a dye-sensitized solar cell (DSSC). SAMs with different functional group were modified in between the TiO2/Electrolyte and FTO/TiO2 junction inside the work electrode. The work function of TiO2 working electrode were alter by the fabrication of SAMs, the lower work function can lead to higher energy barrier when injecting the electron, prompting the increase of Voc .furthermore, positive dipole moment on TiO2 working electrode surface by SAMs modified can attract electrons to the electrode direction forward, increase the speed of electron hole filling, result in higher Jsc.And for the optimized results, 3CN SAM modified cell can lead to higher conversion efficiency because of lower work function, positive dipole moment on TiO2 and its surface, and sustain amount of dye adsorption, from ~7.6% to ~8%
For the FTO/TiO2 junction, the SAMs were passivated on FTO electrode prior to the TiO2 absorption layer was doctor- bladed on it and sintered at 500oC. Charge mobility through FTO/TiO2 with SAMs-assisted fabrication process were proven to be improved comparing to the pristine device interface without SAMs-assisted process. Minute investigation indicated that the extreme hydrophilic nature of SAMs fabricated on the FTO, helped the TiO2 initial layer to be more compact in nature, resulting a decrease of impedance in FTO/TiO2 junction, which facilitated higher electron mobility and helped to improve the light conversion efficiency.The highest improvement of the cell conversion efficiency was from ~7.7% to ~8.6% under AM1.5G (1 sun), which was 13% of enhancement.

[1] 黃秉鈞:‘人類未來能源問題’, 科學發展, 民國九十四年, 386, pp.
第57-61 頁
[2] 網站： http://pvcdrom.pveducation.org/index.html
PVCDROM
[3] A. Yella. H.W. Lee, H.N. Tsao, C Yi, A.K. Chandiran,
M.K. Nazeeruddin, E.W.G. Diau, C.Y Yeh,S.M. Zakeeruddin,
M. Gratzel, Science., 334, 629(2011)
[4] S.E. Shaheen, D.S. Ginley, G.E. Jabbour, MRS Bulletin, 30,
10(2005)
[5] M.A. Green, Prog.Photovolt:Res. Appl., 16, 61 (2008)
[6] M. Gratzel, Nature, 353, 737(1991)
[7] M. Gratzel, Inorganic Chemistry, 44(20), 6841(2005)
[8] S.C. Lin,Y.L Lee, C.H. Chang, Y.J. Shen, Y.M. Yang, Appl.
Phys.Lett, 90(14), 143517(2007)
[9] Y Luo, D Li, and Q Meng, Adv. Materials., 21, 1(2009)
[10] C.F. Lao, Z.Z. Chu, D.C. Zou, Wuli Huaxue Xuebao/ Acta Physico.,
27-2, 419(2011)
[11] C.P. Cho, C.C. Chu, W.T. Chen, T.C. Huang, Y.T. Tao, J. Mater.
Chem., 22, 2915(2012)
[12] A. Ulman, "An Introduction to Ultra-thin Organic Film",
Academic Press, San Diego.(1991)
[13] J.C. Love, L.A. Estroff, J.K. Kriebel, R.G. Nuzzo, G.M.
Whitesides, Chem. Rev, 105, 1103(2005)
[14] A.Ulman, Academic Press, San Diego. (1993)
[15] A. Ulman, Chem. Rev., 96, 1533(1996)
[16] S. Khodabakhsh, B.M. Sanderson, J. Nelson, S.J. Tim, Adv. Funct.
Mater., 16, 95(2006)
[17] J.S. Kim, J.H. Park, J.H. Lee, App.Phys.Let., 91, 112111 (2007)
[18] S.W. Rhee, W.S. Kwon, Korean J. Chem. Eng., 28(7), 1481(2011)
[19] K. Hara, Y.D. oh, C. Kasada, Y. Ohgab, A. Shinpo, S. Suga, K. Sayama, H. Arakawa, Langmuir, 20, 4205(2004)
[20] K. Haraa, Y. Tachibanaa, Y. Ohgab, A. Shinpob, S. Sugab, K. Sayamaa, H. Sugiharaa, H. Arakawaa, Sol. Energy Mater. Sol. Cells, 77, 89(2003)
[21] C. Klein, Inorg. Chem., 44, 178(2005)
[22] M. Gratzel, Inorg. Chem., 44, 6841(2005).
[23] P. Wang, C. Klein, R.H. Baker,S. M. Zakeeruddin, M. Gratzel,
J. Am. Chem. Soc., 127, 808(2005).
[24] Zaban et al., J. Phys. Chem. B, 102, 452(1998)
[25] J. Cremer, PhD Thesis (2005)
[26] G. Sivalingam, Applied Catalysis B: Environmental, 45, 23(2003)
[27] http://www-o.ntust.edu.tw/~ch/ESCA2002/ESCA2008.html, X 射
線光電子能譜儀 (X-ray Photoelectron Spectroscope, XPS)
[28] http://ppt.cc/h_rg, Jasco Analytical Instruments
[29] http://ppt.cc/XAB1, Newport Co, Ltd
[30] D.I.K. Petritsch, PhD Thesis. (2000)
[31] C. Longo, J. Freitas, M. DePaoli, J. Photochem and Photobiology A: Chem., 159, 33(2003)
[32] Q. Wang, J.E. Moser, M. Gratzel, J. Phys. Chem. B, 109,
14945(2005)
[33] H.L. Yip, S.K. Hau, N.S. Baek, M. Hong , and Alex.K.Y. Jen,
Adv. Mater., 20, 2376(2008)
[34] C. Goh, S.R. Scully, M.D. McGehee, J. Appl. Phys.,101,
114503(2007)
[35] D.R. Coronado, G.R. Gattorno,M.E.E. Pesqueira, C. Cab,
R.de.Coss, G. Oskam, , Nanotech., 19, 145605(2008)
[36] J.F. Moulder, W.F. Stickle, P.E. Sobol, K.D. Bomben, Physical
electronics., (1995)
[37] K. Heister, H.T. Rong, M. Buck, M. Zharnikov, M. Grunze, J. Phys. Chem., 105, 6888(2001)