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Large-Area Nonfullerene Organic Solar Cell Modules Fabricated by a Temperature-Independent Printing Method.

Soyeong JeongByoungwook ParkSoonil HongSeok KimJehan KimSooncheol KwonJong-Hoon LeeMin Soo LeeJong Chun ParkHongkyu KangKwanghee Lee
Published in: ACS applied materials & interfaces (2020)
Despite recent breakthroughs in the fabrication of spin-coated small-area devices (≤0.1 cm2) with power conversion efficiencies (PCEs) of more than 17%, printed large-area organic solar cells (OSCs) are significantly less efficient because of the intrinsic differences between the coating dynamics of the two types of OSCs. The PCEs of printed large-area (∼100 cm2) OSCs have typically been decreased compared with those of small-area spin-coated devices. In this work, an efficient low-temperature printing method to fabricate high-efficiency large-area nonfullerene-based OSC modules is successfully demonstrated. A systematic study of the relationship between the concentration of the photoactive solution and the resulting film properties reveals that the large-area modules (85 cm2) produced in this work deliver excellent performance, yielding PCEs of up to 8.18% with a geometric fill factor of 85%. These novel OSC modules are ∼87% as efficient as small-area printed single cells (cell PCE ∼9.43% with 1 cm2).
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