6533b7d0fe1ef96bd125a2a6

RESEARCH PRODUCT

Nonfullerene Polymer Solar Cells Reaching a 9.29% Efficiency Using a BODIPY-Thiophene Backboned Donor Material

Ganesh D. SharmaNicolas DesboisPierre D. HarveyRajneesh MisraClaude P. GrosLéo BucherLéo Bucher

subject

Materials scienceOrganic solar cellOpen-circuit voltageCarbazoleEnergy conversion efficiencyEnergy Engineering and Power Technology02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnologyPhotochemistry7. Clean energy01 natural sciencesAcceptorPolymer solar cell0104 chemical scienceschemistry.chemical_compoundchemistryMaterials ChemistryElectrochemistryChemical Engineering (miscellaneous)Electrical and Electronic Engineering0210 nano-technologyHOMO/LUMOShort circuit

description

A conjugated polymer donor containing BODIPY-thiophene dyads in the backbone, P(BdP-EHT), combined with a low bandgap nonfullerene acceptor (SMDPP) consisting of carbazole and diketopyrrolopyrrole units linked with a tetracyanobutadiene acceptor π-linker, was used to design bulk heterojunction polymer solar cells. After the optimization of the donor to acceptor weight ratio and solvent vapor annealing of the P(BdP-EHT):SMDPP active layer, the resulting polymer solar cell showed an overall power conversion efficiency of 9.29%, which is significantly higher than that for the polymer solar cell based on PC71BM (7.41%) processed under identical conditions. This improved power conversion efficiency is attributed to enhanced values of short circuit photocurrent and open circuit voltage, the better light harvesting efficiency of the P(BdP-EHT):SMDPP active layer in the near-infrared region, and the higher Lowest Unoccupied Molecular Orbital (LUMO) energy level of the SMDPP as compared to PC71BM, combined. Moreov...

yearjournalcountryeditionlanguage
2018-06-15ACS Applied Energy Materials
https://doi.org/10.1021/acsaem.8b00535