CHEM Seminar - All-Polymer Solar Cells Based on Novel Narrow-Bandgap Polymer Acceptors
10:30am - 11:00am
Room 4504, 4/F (Lifts 25/26), Academic Building, HKUST

Speaker: Professor Maojie ZHANG

Institution: College of Chemistry, Chemical Engineering and Materials Science, Soochow University

Hosted by: Professor Henry He YAN



In this work, a novel narrow-bandgap conjugated polymer acceptor (PN1) based on electron-withdrawing 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis[3-((2-hexyldecyl)oxy)benzene]-dithieno[2,3-d:2 ',3 '-d ']-s-indaceno[1,2-b:5,6-b ']dithiophene as the core building block and thiophene as the linking unit was developed and applied in all-polymer solar cells (all-PSCs). The PN1 exhibits a broad and strong absorption in the region of 550-800 nm with a high maximum extinction coefficient of 1.28×105 cm-1, a high electron mobility of 9.39×10-4 cm2/V·s and more ordered molecular packing. In addition, it also possesses a relatively higher lowest unoccupied molecular orbital (LUMO) of -3.85 eV, which is beneficial to improve open circuit voltage (Voc) and reduce the energy loss of the device. By matching with the wide bandgap polymer donor PM6, the all-PSCs achieved a power conversion efficiency (PCE) of 10.5% with a large Voc of 1.0 V, a high short circuit current density (Jsc) of 15.2 mA/cm2 and a superior fill factor (FF) of 0.69. Our work demonstrated that PN1 is a promising polymer acceptor for application in all-PSCs.


About the speaker

Professor ZHANG has published over 120 papers with more than 6000 citations (h-index = 43). Developed multiple new design strategies for organic photovoltaic materials; fabricated high-performance polymer solar cells. Awards include: National Science Fund for Outstanding Young Scholars in 2014; Jiangsu province innovative and entrepreneurial talent in 2017; Web of science highly cited researcher in 2018. 

Event Format
Recommended For
PG students
Faculty and staff
Department of Chemistry
Post an event
Campus organizations are invited to add their events to the calendar.