Mixed molecular orientations promote charge transport in bulk heterojunction solar cells

Pravini S Fernando; Detlef-M Smilgies; Jeffrey M Mativetsky

doi:10.1039/d2cc01234k

Mixed molecular orientations promote charge transport in bulk heterojunction solar cells

Chem Commun (Camb). 2022 May 10;58(38):5765-5768. doi: 10.1039/d2cc01234k.

Authors

Pravini S Fernando¹, Detlef-M Smilgies^{2

3}, Jeffrey M Mativetsky^{1

3}

Affiliations

¹ Department of Physics, Applied Physics and Astronomy, Binghamton University, Binghamton, New York, 13902, USA. jmativet@binghamton.edu.
² Center for Advanced Microelectronics Manufacturing (CAMM), Binghamton University, Binghamton, New York, 13902, USA.
³ Materials Science and Engineering Program, Binghamton University, Binghamton, New York, 13902, USA.

PMID: 35451433
DOI: 10.1039/d2cc01234k

Abstract

By systematically varying the molecular orientation of poly(3-hexylthiophene-2,5-diyl) (P3HT) in P3HT:fullerene bulk heterojunctions, we show that a mixed face-on and edge-on texture can be beneficial for out-of-plane charge flow in solution processed organic bulk heterojunction solar cells. These results implicate the need to balance in-plane and out-of-plane pathways for efficient charge percolation in bulk heterojunctions.