High-performance polymer solar cells based on terpolymer composed of one donor and two acceptors processed with non-halogenated solvent

Jung, Hyeonwoo; Yu, Gyeonghwa; Jang, Seokhoon; Hwang, Inkook; Kim, Bomi; Kim, BongSoo; Lee, Youngu

doi:10.1016/j.orgel.2020.105929

Cited by 6 publications

(7 citation statements)

References 40 publications

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“…These results indicate that the PBTPBD‐50:IT‐4F blended film exhibited a predominant face‐on orientation against the substrate and a much more balanced CCL PBTPBD‐50 /CCL IT‐4F compared with other polymers, which is advantageous for balanced hole and electron mobility. [ 30,31 ] Meanwhile, the PM6:IT‐4F blended film showed a high CCL PM6 /CCL IT‐4F value of 1.19. The crystallization of the PM6 copolymer dominates in the blended film due to the significant crystallinity at 0.28 Å −1 in the in‐plane direction.…”

Section: Resultsmentioning

confidence: 99%

Unprecedented Long‐Term Thermal Stability of 1D/2A Terpolymer‐Based Polymer Solar Cells Processed with Nonhalogenated Solvent

Jung

Kim

et al. 2021

Solar RRL

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Donor–acceptor (D–A) copolymer‐based polymer solar cells (PSCs) processed with nonhalogenated solvents exhibit relatively low power conversion efficiencies (PCE) due to undesirable morphological properties, including high aggregation and unfavorable orientation. Moreover, they show very poor long‐term stability owing to excessive molecular aggregation and unfavorable phase separation. Thus, novel p‐type polymers are required for high‐efficiency and long‐lived PSCs that can be processed in ecofriendly nonhalogenated solvents. Herein, a novel series of 1D/2A terpolymers (PBTPBD) composed of 4,8‐bis(5‐(2‐ethylhexyl)‐4‐fluorothiophen‐2‐yl)benzo[1,2‐b:4,5‐b′]dithiophene (BDT‐F), 1,3‐bis(thiophen‐2‐yl)‐5,7‐bis(2‐ethylhexyl)benzo‐[1,2‐c:4,5‐c′]dithiophene‐4,8‐dione (BDD), and 1,3‐bis‐(4‐hexylthiophen‐2‐yl)‐5‐octyl‐4H‐thieno[3,4‐c]pyrrole‐4,6(5H)‐dione (HT‐TPD) is synthesized and characterized for high‐efficiency and long‐lived PSCs. A PBTPBD‐50:IT‐4F blended film exhibits a favorable face‐on orientation and superior hole and electron mobility. Therefore, the corresponding PBTPBD‐50:IT‐4F PSC, processed with a nonhalogenated solvent, exhibits a high PCE of 13.64%, which is 13% higher than that of the related nonhalogenated solvent‐processed PSCs. Furthermore, the PBTPBD‐50:IT‐4F PSC maintains 82% of the initial PCE even after 204 days at 85 °C, which is the highest thermal stability achieved among PSCs processed with nonhalogenated solvents. The high‐efficiency and superior long‐term thermal stability of the PBTPBD‐50:IT‐4F PSC are attributed to the excellent miscibility of PBTPBD‐50 and IT‐4F and the suppression of the morphological changes in the photoactive layer.

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Section: Resultsmentioning

confidence: 99%

Unprecedented Long‐Term Thermal Stability of 1D/2A Terpolymer‐Based Polymer Solar Cells Processed with Nonhalogenated Solvent

Jung

Kim

et al. 2021

Solar RRL

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“…In 2020, Jung et al reported a series of random copolymer donors, namely, PBDTBD‐x, containing BDD and BT derivative, DTffBT, as the A‐moiety, and BDT as the D‐segment. [ 41 ] All the PBDTBD‐x random copolymers exhibited excellent solubility in nonhalogenated solvents. With more BDD segments incorporated, the resulting random copolymers produced much lower HOMO energy levels.…”

Section: Random Copolymerized Donor Materialsmentioning

confidence: 99%

Recent Research Progress in Random Copolymerization of Polymer Photovoltaic Materials for High‐Performance Polymer Solar Cells

et al. 2023

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Along with the development of narrow‐bandgap A–D–A and A–DA’D–A‐type small‐molecule acceptors (SMAs), polymer solar cells (PSCs) have witnessed a striking progress, with an impressing power conversion efficiency (PCE) approaching 20% recently. Aiming to realize the future commercial application of organic photovoltaic (OPV) technology, developing more efficient organic conjugated materials is urgently needed. Benefiting from the specific advantages in precisely adjusting the optoelectronic materials, random copolymerization strategy has drawn great attention during the past several years and has played a vital role in the development of PSCs. Herein, the functions of random copolymerization strategy in modulating the polymer properties are briefly discussed. Then the recent research progress of random copolymerization strategy of polymer photovoltaic materials in PSCs is reviewed. Finally, perspectives and a concise outlook on the further advancement of the random copolymerization strategy are put forward.

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“…Subsequently, based on the reported results of PBDTBT, Wang and co-workers synthesizedPBDTFBT (2016) by further introducing two "F" atoms into the BTDz unit, while the J sc and FF in PBDTBT: PC 71 BM based OSC are still low. [164] Afterward, to further explore the potential application of fluorinated BTDz unit in main-chain engineering, PDT-T-FBSe (2013) synthesized by Li et al [165] ; a series of novel polymer donorsPBDTT-DS1-BTff (2016) , PBDTT-DS2-BTff (2016) ,PBDTT-DS3-BTff (2016) and PBDTT-DS4-BTff (2016) were reported by Deng et al [166] ; P5 (2019)and PBDTBD-100 (2020) were also designed by Li et al [167] and Jung et al [168] , respectively. Consistent with the above-conclusions, due to the introduction of alkylthiothiophene or 9λ 2 -carbazole based side chains further broaden the π-π conjugated plane in polymer donors, PBDT-T-FBSe: PC 71 BM based (0.78 V), PBDTT-DS1-BTff: PC 71 BM based (0.93 V), PBDTT-DS2-BTff: PC 71 BM based (0.92 V), PBDTT-DS3-BTff: PC 71 BM based (0.91 V), PBDTT-DS4-BTff: PC 71 BM based (0.93 V) and P5 (2019): PC 71 BM based (0.91 V) OSCs obtained a highV oc .…”

Section: δ-π-α-π τψπε πολψμερ δονορςmentioning

confidence: 99%

Research progress and application of high efficiency organic solar cells based on benzodithiophene donor materials

Lin,

Peng,

Shi

et al. 2023

Preprint

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In recent decades, the demand for clean and renewable energy has grown increasingly urgent due to the irreversible alteration of the global climate. As a result, efficient organic solar cells (OSCs) have gradually gained attention as a study hotspot. To break up this dilemma, this paper reviews the molecular design strategies of benzodithiophen (BDT)-based polymer and small molecule donor materials since their birth, focusing on the development of main-chain engineering, side-chain engineering and other unique molecular design paths. Up to now, the state-of-the-art power conversion efficiency (PCE) of binary OSCs prepared by BDT-based donor materials has approached 20%. Our work detailly discusses the potential relationship between the molecular changes of donor materials and photoelectric performance in corresponding OSC devices, thereby presenting a rational molecular design guidance for stable and efficient donor materials in future.

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High-performance polymer solar cells based on terpolymer composed of one donor and two acceptors processed with non-halogenated solvent

Cited by 6 publications

References 40 publications

Unprecedented Long‐Term Thermal Stability of 1D/2A Terpolymer‐Based Polymer Solar Cells Processed with Nonhalogenated Solvent

Unprecedented Long‐Term Thermal Stability of 1D/2A Terpolymer‐Based Polymer Solar Cells Processed with Nonhalogenated Solvent

Recent Research Progress in Random Copolymerization of Polymer Photovoltaic Materials for High‐Performance Polymer Solar Cells

Research progress and application of high efficiency organic solar cells based on benzodithiophene donor materials

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