Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Acta Polymerica Sinica》 2018-02
Add to Favorite Get Latest Update

High-performance All Polymer Solar Cells Fabricated with Non-halogenated Solvent

Wen-tao Xiong;Yi-kun Guo;Da-hui Zhao;Yan-ming Sun;School of Chemistry,Beihang University;College of Chemistry,Peking University;  
Despite the rapid progress that has been made in increasing the power conversion efficiency(PCE) of organic solar cells(OSCs) over the past decade,it is a challenge to realize efficient and environment-friendly OSCs.In this contribution,all polymer solar cells were fabricated with a blend of poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b']dithiophene-co-3-fluorothieno[3,4-b]thiophene-2-carboxylate](PTB7-Th) donor and vinylene-bridged perylenediimide-based polymer(PDI-V) acceptor,in which non-halogenated tetrahydrofuran(THF) was used as the host solvent.A conventional device structure of ITO/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)/PTB7-Th:PDI-V/zirconium acetylacetonate(Zr Acac)/Al was employed,where PEDOT:PSS functioned as the hole transporting layer(HTL) and Zr Acac functioned as the electron transporting layer(ETL).The mixed solution of PTB7-Th and PDI-V was spin cast on the top of PEDOT:PSS layer to form the active layer.After that,Zr Acac solution was spin cast on the top of PTB7-Th:PDI-V layer.Different thermal annealing temperatures were used to optimize the active layer morphology.In details,OSCs without thermal annealing showed a PCE of 7.1%,with a short-circuit current(JSC) of 14.9 mA/cm~2,an open-circuit voltage(VOC) of 0.74 V,and a fill factor(FF) of 64%.The devices annealed at 120 ℃ showed a high PCE of 8.1% with a JSC of 15.5 mA/cm~2,a VOC of 0.74 V,and a FF of 70%.Further increasing the annealing temperature to 150 ℃ led to decreased FF and thereby a relatively lower PCE(7.4%).To the best of our knowledge,the PCE of ~ 8.1% is one of the highest PCE values reported in the literature so far for all polymer solar cells.The high and balanced hole and electron mobility partially contributed to such a high performance.These results suggest that THF as good non-halogenated solvent can be used to fabricate high-performance all polymer solar cells.Higher efficiency can be achieved for OSCs with THF solvent when better polymer acceptors are employed.
【Fund】: 国家自然科学基金(基金号21734001 21674069)资助项目
【CateGory Index】: TM914.4
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved