High Performance Air‐Processed Organic Photovoltaic Modules (≈55 cm2) with an Efficiency of >17.50% by Employing Halogen‐Free Solvent Processed Polymer Donors

Author:

Gokulnath Thavamani1,Kim Hyerin1,Lee Jieun1,Cho Bo Hyeon1,Park Ho‐Yeol1,Jee Jesung1,Kim Young Yong2,Kranthiraja Kakaraparthi1,Yoon Jinhwan1ORCID,Jin Sung‐Ho1ORCID

Affiliation:

1. Department of Chemistry Education Graduate Department of Chemical Materials Institute for Plastic Information and Energy Materials Sustainable Utilization of Photovoltaic Energy Research Center (ERC) Pusan National University Busandaehakro 63‐2 Busan 46241 Republic of Korea

2. Beamline Division Pohang Accelerator Laboratory Pohang University of Science and Technology Pohang 37673 Republic of Korea

Abstract

AbstractOrganic photovoltaic (OPV) sub‐modules shall be feasible for production using halogen‐free solvents in air,high power conversion efficiencies (PCEs), and long‐term stability, which are challenging requirements. To achieve this goal, air‐processed OPVs are fabricated by employing a synthesized set of π‐conjugated polymers, NAP‐T‐SiBTZ (P1) and NAP‐TT‐SiBTZ (P2), with thiophene and thienothiophene π‐spacers, respectively. P1 and P2 incorporated ternary OPVs show excellent PCEs and are used to produce small‐area, sub‐module air‐processed devices using o‐xylene as the solvent. Interestingly, P2‐added ternary devices has remarkable PCEs of 17.62% (PM6:P2:Y7) and 17.96% (PM6:P2:L8‐BO), which is the highest reported for air‐processed OPVs. . Notably, P2‐associated ternary blends exhibit a nano‐morphology, increased charge carrier mobilities, exciton dissociation, and decreased non‐geminate recombination, which are deemed responsible for the enhanced PCEs observed. In addition, P2 demonstrates high efficiency for a thick‐film device (>300 nm), with a PCE of >16.50%. Notably, a 55 cm2 sub‐module produced by bar coating using o‐xylene in open air has a PCE of 13.88%. Additionally, P2‐containing devices demonstrate impressive thermal and photo‐stabilities. This study shows the potential of an OPV that may be used to produce low‐cost solar cell sub‐module at low cost with exceptional commercial value.

Funder

National Research Foundation

Publisher

Wiley

Subject

General Materials Science,Renewable Energy, Sustainability and the Environment

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