銀奈米石墨烯作為電洞傳輸層與主動層混摻PCPDTBT的軟性高分子太陽能電池之研究

• Main Authors: YAN BO WANG, 王彥博
• Other Authors: Ou Zhen Fang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/22240633876531759489

碩士 === 國立勤益科技大學 === 化工與材料工程系 === 104 === There are three properties of graphene: good electrical conductivity, good thermal conductivity and thermal stability. In the future, graphene may become a new field of electrically conductive material. Graphene/Ag nanoparticles (GAg) were synthesized via a Hummer method, employing graphene oxide as a precursor of graphene, AgNO3 as a precursor of Ag nanoparticles, and sodium citrate as a reducing and stabilizing agent.In this study, we reported enhanced power conversion efficiency of the fiexible solar cell using two donors of poly(3-hexylthiophene) (P3HT) and poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b’]-dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT) to aborsb IR and visible light, relatively. The cell structure was (A)PET/ITO/PEDOT:PSS/P3HT:PCPDTBT:PC71BM/Ca/Al. Three compositions of the active layers of P3HT: PCPDTBT: PC71BM were 1:0.04:1, 1:0.06:1 and 1:0.08:1 by weight. On the other hand, we replaced PEDOT: PSS with GAg in flexible solar cells. PEDOT: PSS can corrode the ITO and reduce the performance of organic solar cell due to its high acidity. The cell structures was (B)PET/ITO/GAg(1.5mg/ml)/P3HT: PCPDTBT:PCBM/Ca/Al. Three compositions of the active layers of P3HT: PCPDTBT: PC71BM were 1:0.04:1, 1:0.06:1, 1:0.08:1 by weight. From these results, the device (A) with the composition of active layer of 1:0.04:1 showed the best enhancement. The short circuit current density (Jsc) was increased from 9.9 mA/cm2 to 10.4 mA/cm2, increased by 5.1%. The power conversion efficiency (PCE) was increased from 1.65% to 2.53%, increased by 53.3%. We could find that the performance of device was enhanced by adding PCPDTBT into active layer. The absorption spectrum of UV-Vis become wider and increase the chance of photocurrent generated in the device by adding PCPDTBT into active layer. The hole transport layer of PEDOT: PSS was replaced by GAg in device (B). From these results the device (B) with the composition of active layer of 1:0.06:1 by weight showed the best enhancement. The short circuit current density was increased from 8.9 mA/cm2 to 9.4 mA/cm2, increased by 5.6%. The power conversion efficiency was increased from 1.27% to 2.00%, increased by 57.4%. Theses results may be due to the high electron mobility of silver nano graphene.The other hand, belending PCPDTBT into active layer in the flexible polymer solar cells resulted in more photo-induced charge carries generation due to the broad absorption range of PCPDTBT.