Polymer solar cells made with photocrosslinkable conjugated donor–acceptor block copolymers: improvement in the thermal stability and morphology with a single-component active layer

Kwon, Na Yeon; Park, Sungnam; Cho, Seunguk; Lee, Jun Young; Harit, Amit Kumar; Woo, Han Young; Cho, Min Ju; Choi, Dong Hoon

doi:10.1039/d2py00413e

Cited by 3 publications

(4 citation statements)

References 43 publications

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“…We successfully synthesized PM6- b -TT bearing a medium-band gap PM6 as the first D 1 and a wide-band gap PBDT-TT as the second D 2 using the one-pot polymerization method. − Scheme depicts the synthesis pathway and expected structure of PM6- b -TT. After polymerization, the recovered crude product was purified using Soxhlet extraction with acetone, hexane, methylene chloride (MC), and chloroform (CF).…”

Section: Resultsmentioning

confidence: 99%

“…Meanwhile, conjugated block copolymers (CBPs) have been developed as promising active materials for PSCs, which enable better nanoscale control of donor (D)–acceptor (A) interfaces in thin-film morphology and improve the performance of PSCs. − In our previous study, to synthesize the D–A CBPs, we introduced “one-pot polymerization” and reported the synthesis of a novel, highly crystalline CBP using this strategy. − Two donor blocks can be combined to improve the performance of PSCs, or acceptor blocks and donor blocks can be combined with each other for application to single-component PSCs. − Although CBPs represent a huge potential for PSCs, CBPs containing two donor blocks have been less explored than representative D–A-type block copolymers, leaving room for further improvement in CBP design.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Efficiency and Stability of Novel Pseudo-ternary Polymer Solar Cells Enabled by a Conjugated Donor Block Copolymer

Park

Kwon

Jung

et al. 2023

ACS Appl. Mater. Interfaces

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The recent breakthrough in power conversion efficiencies (PCEs) of polymer solar cells (PSCs) that contain an active layer of a ternary system has achieved values of 18−19%; this has sparked interest for further research. However, this system has difficulties in optimizing the composition and controlling the interaction between the three active materials. In this study, we investigated the use of a donor 1 (D 1 )−donor 2 (D 2 ) conjugated block copolymer (CBP), PM6-b-TT, to replace the physical blend of two donors. PM6-b-TT, which exhibits an extended absorption range, was synthesized by covalently bonding PM6, a medium-band gap polymer, with PBDT-TT, a wide-band gap polymer. The blend films containing PM6-b-TT and Y6-BO acceptor, demonstrated excellent crystallinity and a film morphology favorable for PSCs. The corresponding pseudo-ternary PSC exhibited significantly higher PCE and thermal stability than the PM6:PBDT-TT-based ternary device. This study unambiguously demonstrates that the novel D 1 −D 2 CBP strategy, combined with the conventional binary and ternary system advantages, is a promising material production strategy that can boost the performance of future PSCs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Efficiency and Stability of Novel Pseudo-ternary Polymer Solar Cells Enabled by a Conjugated Donor Block Copolymer

Park

Kwon

Jung

et al. 2023

ACS Appl. Mater. Interfaces

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“…10 Therefore, the design and synthesis of WBG polymeric donors based on the above characteristics play an important role in the development of PSCs. 11…”

Section: Introductionmentioning

confidence: 99%

“…23,28–31 Moreover, different from halogen atoms, the ester substituent can be easily synthesized from a wide variety of alcohols or halogenated alkanes, and then appropriate alkyl chains can be directly introduced to monomers and the corresponding polymers, which are very important for solution processed materials. 11,32,33…”

Section: Introductionmentioning

confidence: 99%

A study of the use of carbonyl and ester groups in regulating the optical and electrical characteristics of wide bandgap polymers for organic solar cells

Zhang

et al. 2023

Polym. Chem.

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Complementary Absorption Pseudo‐Ternary Blend Containing a Y‐Series Block Copolymer Acceptor for Indoor and Outdoor All‐Polymer Photovoltaics

Chau,

Park,

Park

et al. 2023

Solar RRL

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All‐polymer photovoltaics (all‐PPVs) that operate under both indoor and outdoor lighting conditions require active layers with appropriately adjusted optical‐absorption ranges. However, the optical absorption of a conventional donor–acceptor binary blend is restricted to the combined absorption bands of its components. Herein, a new conjugated block copolymer (CBC) acceptor, b‐PYT, is designed by integrating polymer acceptor blocks of wide and narrow bandgaps in a single structure. Such combination results in the wide absorption range (550–850 nm) of b‐PYT that matches the emission of both artificial and solar light. The b‐PYT CBC acceptor is more crystalline than the corresponding random terpolymer, r‐PYT, owing to improved interactions between its macromolecular acceptor units. Despite exhibiting slightly inferior outdoor performance compared to that of devices using the homopolymer BTTP‐T, the PM6:b‐PYT‐based devices deliver superior power conversion efficiency (PCE) under indoor light‐emitting diode (LED) light owing to better matched absorption and emission spectra of b‐PYT and a cold white LED, respectively. Additionally, it is worth highlighting that PM6:b‐PYT‐based all‐PPVs can maintain approximately 87% of the initial PCE even after 600 min of thermal aging at 150 °C, which demonstrates the superior thermal stability compared with those of all‐PPVs that use traditional binary active layers.

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Polymer solar cells made with photocrosslinkable conjugated donor–acceptor block copolymers: improvement in the thermal stability and morphology with a single-component active layer

Abstract: Recently, conjugated donor–acceptor block copolymers (CDABPs) were synthesized by one-pot polymerization and applied in polymer solar cells with a single-component active layer. These polymers can suppress phase separation and exhibit...

Cited by 3 publications

References 43 publications

Enhanced Efficiency and Stability of Novel Pseudo-ternary Polymer Solar Cells Enabled by a Conjugated Donor Block Copolymer

Enhanced Efficiency and Stability of Novel Pseudo-ternary Polymer Solar Cells Enabled by a Conjugated Donor Block Copolymer

A study of the use of carbonyl and ester groups in regulating the optical and electrical characteristics of wide bandgap polymers for organic solar cells

Complementary Absorption Pseudo‐Ternary Blend Containing a Y‐Series Block Copolymer Acceptor for Indoor and Outdoor All‐Polymer Photovoltaics

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