Rational design of a main chain conjugated copolymer having donor–acceptor heterojunctions and its application in indoor photovoltaic cells

Kwon, Na Yeon; Park, Sungnam; Kang, Hye Won; Takaloo, Ashkan Vakilipour; Harit, Amit Kumar; Woo, Han Young; Kim, Tae Geun; Yoon, Ho‐Geun; Cho, Min Ju; Choi, Dong Hoon

doi:10.1039/d0ta06420c

Cited by 26 publications

(26 citation statements)

References 58 publications

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“…To confirm the photoinduced charge dissociation properties of the PM7:IT-4F, PJ-50 :IT-4F, and J52-Cl:IT-4F blend films, we conducted contact potential difference (CPD) measurements using Kelvin probe force microscopy (KPFM) in the dark and under continuous-wave laser illumination at 532 nm. − Figure shows the CPD histograms of the blend films spin-coated on an ITO substrate. We used these to examine the relative trends of CPD in the context of degrees of shift and dispersion of values.…”

Section: Resultsmentioning

confidence: 99%

Nonhalogenated Solvent-Processed High-Performance Indoor Photovoltaics Made of New Conjugated Terpolymers with Optimized Monomer Compositions

Park

Kwon

Kim

et al. 2021

ACS Appl. Mater. Interfaces

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Conjugated random terpolymers, PJ-25, PJ-50, and PJ-75 were successfully synthesized from three different monomers. Fluorine-substituted benzotriazole (2F-BTA) was incorporated into 4,8-bis(4-chlorothiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene (BDT-T-Cl) and a 1,3-bis(4-(2-ethylhexyl)thiophen-2-yl)-5,7-bis(2-alkyl)benzo[1,2-c:4,5-c′]dithiophene-4,8-dione (BDD)-based alternating copolymer PM7 as a third monomeric unit. The solubility of the random terpolymers in nonhalogenated solvents increased with the number of 2F-BTA units in PM7. The random terpolymers were mixed with 3,9-bis(2-methylene-) to fabricate organic photovoltaic (OPV) cells. Among the three terpolymers and two related binary copolymers (e.g., PM7 and J52-Cl), outdoor photovoltaic (PV) cells (AM 1.5G) based on the PJ-50:IT-4F blend showed a high power conversion efficiency (PCE) of 11.34%. In addition, PJ-50 was employed as a donor in indoor PV (IPV) cells and was blended with nonfullerene acceptors, which have different absorption ranges. Among them, the PJ-50:IT-4F-based IPV device had the highest PCE of 17.41% with a J sc of 54.75 μA cm −2 and an FF of 0.77 under 160 μW cm −2 light-emitting diode (LED) light. The terpolymer introduced in this study can be regarded as a promising material for the fabrication of outdoor PV and IPV cells with excellent performance involving the use of an eco-friendly solvent.

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Section: Resultsmentioning

confidence: 99%

Nonhalogenated Solvent-Processed High-Performance Indoor Photovoltaics Made of New Conjugated Terpolymers with Optimized Monomer Compositions

Park

Kwon

Kim

et al. 2021

ACS Appl. Mater. Interfaces

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“…[37] Kwon et al designed a copolymer for IOPVs. [38] Interestingly, (copolymer of PBDBT donor and PNDI2T acceptor) P(BDBT-co-NDI2T)-based OSCs showed a superior PCE in contrast with P(BDBT):P(NDI2T) devices, the champion PCE of the device was 6.22 % under 1 sun illumination. P(BDBT-co-NDI2T)-based OSCs exhibited a PCE of 12.7 % under LED illumination with an intensity of 500 lx, outperforming P(BDBT):P(NDI2T) OSCs (6.87 %).…”

Section: Binary Non-fullerene-based Devicesmentioning

confidence: 96%

An Overview of High‐Performance Indoor Organic Photovoltaics

Liu

Luo

et al. 2021

ChemSusChem

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In recent years, indoor organic photovoltaics (IOPVs) have attracted increasing attention because of their ability to power microelectronic devices and sensors, especially for the internet of things (IoT). In contrast with silicon‐based indoor PV, the IOPVs exhibit better performance due to their tunable bandgap via molecular design, which could achieve a better spectrum matched with the lighting sources. Based on the simulated power conversion efficiency (PCE) in theory, the maximum value can achieve over 50 % under the white LED illumination, which is much higher than the practical top PCE of 31 %, indicating there is room further to improve the performance of IOPVs by various optimization methods. Based on these benefits, the recent progress in IOPVs with different methods was summarizes, and light was shed on the remaining challenges for achieving practical applications in the future. In the end, some guidelines for the development of IOPVs were proposed.

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“…To overcome these limitations in BHJ systems, single-material organic solar cells (SMOSCs) have been proposed and investigated in the past decade. 19–26 π-Conjugated polymeric organic semiconductors with greater synthetic flexibility allows for the synthesis of block conjugated polymers 27–29 and organic-fullerene molecular dyads, 24,30,31 which chemically connect the donor and acceptor segments in a single molecular system. Under the circumstances, SMOSCs can minimize procedures for preparing ready-to-coat organic conductive ink and photoactive layers.…”

Section: Introductionmentioning

confidence: 99%

Regioselectivity control of block copolymers for high-performance single-material organic solar cells

Yang

et al. 2022

J. Mater. Chem. A

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Rational design of a main chain conjugated copolymer having donor–acceptor heterojunctions and its application in indoor photovoltaic cells

Abstract: We successfully synthesized a crystalline main chain conjugated copolymer, P(BDBT-co-NDI2T), having BDBT donor-NDI2T acceptor heterojunctions in film states. Interestingly, the polymer exhibited a strong absorption band from 500 to 650...

Cited by 26 publications

References 58 publications

Nonhalogenated Solvent-Processed High-Performance Indoor Photovoltaics Made of New Conjugated Terpolymers with Optimized Monomer Compositions

Nonhalogenated Solvent-Processed High-Performance Indoor Photovoltaics Made of New Conjugated Terpolymers with Optimized Monomer Compositions

An Overview of High‐Performance Indoor Organic Photovoltaics

Regioselectivity control of block copolymers for high-performance single-material organic solar cells

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