本研究探討以五環素(pentacene)/駢苯衍生物(perylene derivatives)異質接面太陽能電池之特性，利用pentacene作為電子施體有機材料，N,N'-dioctyl-3,4,9,10-perylenetetracarboxylic diimide (PTCDI-8C)或N,N′-Ditridecylperylene-3,4,9,10-tetracarboxylic diimide (PTCDI-13C)作為電子受體有機材料，製作出異質接面為pentacene/PTCDI-8C及pentacene/PTCDI-13C兩種結構的有機太陽能電池，比較不同碳數的駢苯衍生物對於有機太陽能電池之光電轉換效率之影響。

在AM1.5G、100 mW/cm2的模擬太陽光下，以銀/鋁複合電極為陰極的pentacene/PTCDI-13C異質接面太陽能電池具有短路電流0.415 mA/cm2、開路電壓0.413 V、填充因子0.55及光電轉換效率0.095%，皆比pentacene/PTCDI-8C異質接面太陽能電池的短路電流0.4 mA/cm2、開路電壓0.378 V、填充因子0.49及光電轉換效率0.074%來的大。由薄膜分析可知PTCDI-13C比PTCDI-8C具有更低的電子電洞復合發光效率，可以讓較多激子到達異質接面進行電荷分離，減少電子電洞對復合發光的機率；此外，PTCDI-13C具有較大的載子遷移率，推論這些均為造成pentacene/PTCDI-13C異質接面太陽能電池具有較佳光電轉換效率的原因。

The characteristics of pentacene/perylene derivatives based organic solar cells are discussed in this thesis. Donor and acceptor layers are pentacene and　N,N'-dioctyl-3,4,9,10-perylenetetracarboxylic diimide (PTCDI-8C) or N,N′-Ditridecylperylene-3,4,9,10-tetracarboxylic diimide (PTCDI-13C) respectively. Two organic solar cells, pentacene/PTCDI-8C heterojunction and pentacene/PTCDI-13C heterojunction, were fabricated to compare the influence of power conversion efficiency among perylene derivatives with various numbers of carbon molecules.

Under the sunlight simulator with AM1.5G filter and 100 mW/cm2, the solar cells of pentacene/PTCDI-13C heterojunction with Ag/Al cathode has J-V characteristics of short-circuit current density of 0.415 mA/cm2, open-circuit voltage of 0.413 V, fill factor of 0.55, and power conversion efficiency of 0.095%, which are better than those of pentacene/PTCDI-8C heterojunction. In pentacene/PTCDI-8C based solar cells, the short-circuit current density, open-circuit voltage, fill factor and power conversion efficiency are 0.4 mA/cm2, 0.378 V, 0.49, and 0.074%, respectively. Moreover, according to the thin film analysis, the PTCDI-13C thin　film’s excitons in the surface of heterojunction for dissociation are more and the probability of radiative recombination of electron-hole pair is less than PTCDI-8C. The PTCDI-13C thin-film possesses better carrier mobility than PTCDI-8C. Therefore, we could conclude that those factors mentioned above are the keys of the pentacene/PTCDI-13C based solar cells with better power conversion efficiency.

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