Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김봉수 | - |
dc.date.accessioned | 2016-08-27T04:08:45Z | - |
dc.date.available | 2016-08-27T04:08:45Z | - |
dc.date.issued | 2015 | - |
dc.identifier.issn | 0024-9297 | - |
dc.identifier.issn | 1520-5835 | - |
dc.identifier.other | OAK-15233 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/217371 | - |
dc.description.abstract | It is important to develop new denor (D)acceptor (A) type low band gap polymers for highly stable polymer solar cells (PSCs). Here, we describe the synthesis and photovoltaic properties of two D-A type low band gap polymers. The polymers consist of dithienobentodfthiophene (DTBDT) moieties with expanded conjugation side: groups as donors and 2-ethyl-1-(thieno[3,4-b]thiophen-2yl)hwtan-1-one (TTEH) or 6-octyl-5H-thieno[3',4':4,5]thieno[2,3-c]pyrrole-5,7(6H)-dione (DTPD) as acceptors to give pDTBDT-TTEH and pDTBDT-DTPD polymers, respectively. The pDTBDT-TTEH is quite flat, resulting in a highly crystalline film. In contrast, the pDTBDT-DTPD is highly twisted to yield an amorphous film. Photovoltaic devices based on pDTBDT-TTEH and pDTBDT-DTPD exhibited power conversion efficiencies (PCEs) of 6.74% and 4.44%, respectively. The PCE difference results mainly from morphological differences between the two polymer:PC71BM blend films; the pDTBDT-TTEH polymer formed a nanoscopically networked domains in the blend state, while the pDTBDT-DTPD polymer film contained aggregated domains with large phase separation between the poly-mer and PC71BM molecules. Importantly, we observed that pDTBDT-TTEH-based devices showed excellent stability-in air, retaining 95% of the initial PCE after storage for over 1000 h without encapsulation. The high stability of the pDTBDT-TTEH-based device was originated mainly by the crystalline nature of the pDTBDT-TTEH:PC71BM film. This work suggests that designing highly conjugated planar backboned polymers is crucial to improve not only the photovoltaic performance but also the stability of PSCs. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Highly Stable Polymer Solar Cells Based on Poly(dithienobenzodithiophene-co-thienothiophene) | - |
dc.type | Article | - |
dc.relation.issue | 12 | - |
dc.relation.volume | 48 | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 3890 | - |
dc.relation.lastpage | 3899 | - |
dc.relation.journaltitle | MACROMOLECULES | - |
dc.identifier.doi | 10.1021/acs.macromol.5b00514 | - |
dc.identifier.wosid | WOS:000356988700011 | - |
dc.identifier.scopusid | 2-s2.0-84934982955 | - |
dc.author.google | Shin, Nara | - |
dc.author.google | Yun, Hui-Jun | - |
dc.author.google | Yoon, Youngwoon | - |
dc.author.google | Son, Hae Jung | - |
dc.author.google | Ju, Sang-Yong | - |
dc.author.google | Kwon, Soon-Ki | - |
dc.author.google | Kim, BongSoo | - |
dc.author.google | Kim, Yun-Hi | - |
dc.contributor.scopusid | 김봉수(55588476300) | - |
dc.date.modifydate | 20180827081001 | - |