A New sp2‐sp2 Dialkylethylene‐Bridged Heptacyclic Ladder‐Type Arene for High Efficiency Polymer Solar Cells. Issue 4 (22nd February 2013)

• Record Type: Journal Article
• Authors: Wu, Jhong‐Sian; Lai, Yu‐Ying; Cheng, Yen‐Ju; Chang, Chih‐Yu; Wang, Chien‐Lung; Hsu, Chain‐Shu
• Is Part Of: Advanced energy materials. Volume 3:Issue 4(2013:Apr.)
• Page Start: 457
• Page End: 465
• Publication Date: 2013-02-22
• Subjects: Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201200929
• Languages: English
• ISSNs: 1614-6832

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A new dithienobenzo‐carbazole (DTBC) heptacyclic arene using sp²‐sp² dialkylethylene moiety as the bridge was successfully synthesized by Suzuki‐Miyaura cross‐coupling reaction. This facile benzoannulation planarizes the conjugated framework with the concomitant introduction of four octyl substituents, making the newly designed copolymer PDTBCDTBT exhibit solution processability, superior absorption ability, lower‐lying HOMO energy level, and crystalline nature. The solar cell using PDTBCDTBT has produced a high efficiency of 6.2%, which outperforms the corresponding sp³‐hybridized C‐bridged, Si‐bridged and N‐bridged analogous polymers.</p> </abstract>