光致增強之有機太陽能電池研究

本研究以達成高效率及高生命期之反結構有機太陽能電池，以全溶液製程製作，使用PBD做為電子傳輸層，主動層為塊材異質接面(bulk heterojunction)以P3HT(poly(3-hexythiophene))及PCBM([6,6]-phenyl C61-butyric acid methyl ester)混合製成，使用的溶劑為鄰二氯苯(1,2-Dichlorobenzene, DCB)。結構為ITO / PBD / P3HT:PCBM / PEDOT / Ag。在量測的過程中意外發現，元件的特性表現會因持續量測而逐漸變好，再透過許多後處理排除原因後，我們發現只有利用太陽燈模擬器持續照光此方式能使元件的表現變的更加優異。元件再經由持續照光兩個小時後，短路電流由11.70mA/cm2提升至13.10 mA/cm2，開路電壓由0.32V提升至0.61V，填充因子由0.29提升至0.60，轉換效率則由1.11%提升至4.79%(AM1.5G 100 mW/cm2)。追蹤生命期的研究中，元件皆有封裝的情況下，碳酸銫元件放置在大氣下25後，其效率衰退的幅度已超過50%，而PBD元件放置的前16天還有微幅的上升之後再慢慢下降，經過了41天後其效率與元件剛完成時相同，顯示了PBD元件阻隔水氧能力較碳酸銫元件出色許多。

關鍵字

有機太陽能電池；反相結構太陽能電池；碳酸銫

並列摘要

In this work, we demonstrated a high-performance and long-lifetime inverted polymer solar cell employing PBD as electron transport layer. The active layer was a bulk heterojunction (BHJ) consisting of blending of poly(3-hexylthiophene)(P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM) in 1, 2-Dichlorobenzene, with the inverted device structure：ITO / PBD / P3HT:PCBM / PEDOT / Ag. We discovered the performance of the device became better though continuous measuring the device. Eliminating reasons by many aftertreatments, the only method found to greatly enhance the performance is continued light soaking the device by using the solar simulator. After continuous light soaking two hours, this approach improves the short-circuit current from11.70mA/cm2 to 13.10mA/cm2, open-circuit voltage from 0.32V to 0.61V, fill factor from 0.29 to 0.60, and power conversion efficiency from 1.11% to 4.79%.(AM1.5G 100 mW/cm2) We also traced lifetime of the device, all devices were encapsulated and stored in an ambient atmosphere. The device using Cs2CO3 with deterioration more than 50% after 25 days, but the device using PBD increased slightly at first 16 days then decreased slowly. After 41 days the PCE maintained the same as fabricated. The lifetime of devices with PBD as ETL is much longer than those with Cs2CO3 as ETL.

並列關鍵字

Organic solar cells ； inverted solar cell ； Cs2CO3

參考文獻

[1] D. M. Chapin, C. S. Fuller, and G.L. Pearson, “A New Silicon pn Junction Photocell for Converting Solar Radiation into Electrical Power,” J. Appl. Phys. 25, 676 (1954).

[2] Zhao, A. Wang, and M. A. Green, “24.5% efficiency silicon PERT cells on MCZ substrates and 24.7% efficiency PERL cells on FZ substrates,” Prog. Photovolt. : Res. Appl. 7, 471 (1999).

[3] K. M. Coakley, and M. D. McGehee, “Conjugated polymer photovoltaic cells,” Chem. Mater. 16, 4533, (2004)

[4] Harald Hoppe, and Niyazi Serdar Sariciftci, “Organic solar cell: An review,” J. Mater. Res., Vol. 19, No. 7, Jul 2004

[6] Kyungkon Kim, Jiwen Liu, Manoj A. G. Namboothiry, and David L. Carroll, “Roles of donor and acceptor nanodomains in 6% efficient thermally annealed polymer photovoltaics,” Appl. Phys. Lett. 90, 163511 (2007).

國際替代計量

光致增強之有機太陽能電池研究

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