| Summary: | 碩士 === 國立聯合大學 === 材料科學工程學系碩士班 === 103 === This study is to investigate the characteristics of organic and perovskite solar cells with different interface layers.
(1) The effect of 2-aminoanthracene as the ZnO-nanorod surface modifier.
This topic is cooperated with Hsiu-Kuei Hsu from Department of Physics of National Taiwan University,. Improve the interface between ZnO naonrods and active layer. Because ZnO nanorods are hydrophilic and the active layer is hydrophobic material. Surface modifier material usually is acid substance. It products chemical bond and destroys structure of ZnO nanorods at the same time by eroding surface of ZnO nanorods. Using alkaline material can avoid destroying the structure of ZnO nanorods. We put two basic materials (2-Aminoanthracene, 2-AA) and (4-Amino-p-terphenyl, 4-ApT) on zinc oxide nanorods surface.We can find ZnO nanorods surface become hydrophobic from contact angle test. The absorption efficiency in UV-Vis does not change, but the active layer surface becomes rough, thus increasing the contact area with the silver electrode, so that the Jsc and the photoelectric conversion efficiency of the device is increased. The PCE is increased to 2.29 % in 2-AA, 2.59 % in 4-ApT, and the enhanced rate of PCE is 20.53 % in 2-AA, 36.32 % in 4-ApT.
(2) Blending gold nanoparticles effect to the hole transport layer P3HT in perovskite solar cells.
The standard device structure is ITO / ZnO nanorod / Perovskite / P3HT / Ag in this study. Because the conductivity of P3HT is low, so we blend gold nanoparticles with P3HT to enhance the conductivity of P3HT film. When blending up to 20% of gold nanoparticles, from XRD and UV-Vis , we can find the crystallinity of P3HT is increased , and by measuring conductivity, we can also observe the better crystallinity the higher conductivity. So that the hole can be more rapidly spread to the back electrode, Ag, and let excitons be collected more effectively, that will cause significant improvement in Voc, Jsc , and PCE, the PCE is increased from 3.08 % to 4.29 %, the enhanced rate is 39.29 % , the most enhanced rate among them is in Voc, it can up to 33.02 %.
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