A New Terthiophene-Thienopyrrolodione Copolymer-Based Bulk Heterojunction Solar Cell with High Open-Circuit Voltage

作者：Jo Jang; Pron Agnieszka; Berrouard Philippe; Leong Wei Lin; Yuen Jonathan D; Moon Ji Sun; Leclerc Mario; Heeger Alan J^*

来源：Advanced Energy Materials, 2012, 2(11): 1397-1403.

DOI：10.1002/aenm.201200350

• BHJ solar cells
• chloronaphthalene
• direct heteroarylation
• open-circuit voltages
• TPD

A new semiconducting polymer based on terthiophene-thienopyrrolodione alternating building blocks with a deep HOMO energy level (5.66 eV) is presented. The polymer is prepared by a direct heteroarylation polycondensation reaction, which is a low-cost and green alternative to the standard Stille coupling reaction and thus avoids any use of toxic stannyl derivatives. Integrating the polymer into bulk heterojunction solar cells with [6,6]-phenyl C71-butyric acid methyl ester ([70]PCBM) leads to a PCE of over 6% and a high open-circuit voltage of up to 0.94 V. To obtain these results a unique processing additive, 1-chloronaphthalene, is used, and a relatively low concentration of [70]PCBM is used in the blend solution.

• 出版日期2012-11