High-level periodic conjugated terpolymers through AA/BB monomer pair-type terpolymerization improve performance of polymer solar cells

Jung, Seungmin; Cho, Yongjoon; Ji, Yutong; Oh, Jiyeon; Park, Geunhyung; Kim, Wonjun; Jeong, Seonghun; Lee, Sang Myeon; Chen, Shanshan; Zhang, Youdi; Yang, Changduk

doi:10.1016/j.nanoen.2022.108059

Cited by 15 publications

(15 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After blending with L15, both blend films exhibited the predominant face-on orientation with (010) 𝜋-𝜋 diffraction peaks in the OOP directions and (100) diffraction peaks in the IP directions. [78,79] Noteworthy, the OOP (010) diffraction peaks of the polymer donors in Figure 4c,d overlapped with polymer acceptor L15. In addition, we have performed Gaussian peak fitting to the (010) peak of the 𝜋-𝜋 stacking.…”

Section: Resultsmentioning

confidence: 97%

Polythiophene Derivatives for Efficient All‐Polymer Solar Cells

Bai

Jeong

et al. 2023

Advanced Energy Materials

View full text Add to dashboard Cite

Polymerized small molecule acceptors have recently greatly facilitated the development of all‐polymer solar cells (All‐PSCs) with respect to the power conversion efficiencies (PCEs). However, high‐performance and low‐cost polymer donors for All‐PSCs are still lacking, limiting further large‐scale manufacturing of All‐PSCs. Herein, this work designs and synthesizes a new thiophene derivative, FETVT, featuring vinyl‐bridged fluorine and ester‐substituted monothiophene. Incorporation of FETVT into a polymer yields a high‐performance polythiophene derivative PFETVT‐T, which exhibits deep‐lying HOMO level, suitable solution pre‐aggregation ability, finely‐tuned polymer crystallinity, and appropriate thermodynamic miscibility with the polymer acceptor L15. As a result, binary based on PFETVT‐T achieves a record PCE of 11.81% with agood stability, representing a breakthrough for polythiophenes and their derivatives‐based All‐PSCs, which is also significantly higher than that (1.92%) of All‐PSCs based on its isomerized analog. Remarkably, PFETVT‐T achieves an impressive PCE exceeding 16% via the implementation of a ternary blend design. These findings offer a hopeful pathway toward attaining high‐performance, stable, and cost‐effective PSCs.

show abstract

Section: Resultsmentioning

confidence: 97%

Polythiophene Derivatives for Efficient All‐Polymer Solar Cells

Bai

Jeong

et al. 2023

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

“…To further study the exciton dissociation and charge collection efficiencies of high-performance OSCs based on PM6(FPy = 0.2):BTP-eC9 processed by CF and TL, the plots of photocurrent density (J ph ) versus effective voltage (V eff ) were measured. [11,14,[17][18][19][20][21]23,24,26,30,35,41,43] As shown in Figure S18a (Supporting Information), when V eff >1.5 V, the J ph values of two devices were saturated and, thus, all excitons were dissociated and all the generated charge carriers were collected. Therefore, the exciton dissociation (P diss ) and charge collection probabilities (P coll ) can be estimated from the J ph /J sat ratio at short-current condition and maximum power output.…”

Section: Eco-friendly Solution-processed Oscsmentioning

confidence: 99%

“…To address this issue, several promising terpolymer design strategies have been developed using a third component. [12,[17][18][19][20] Such terpolymer strategies can be highlighted with additional advantages, such as selective absorption and fine-tuning of frontier energy levels. For example, certain D or A units possess chromophores with the absorption of photons in the long-wavelength region, whereas certain units have deep highest occupied molecular orbital (HOMO) levels, resulting in unique copolymers for different applications.…”

Section: Introductionmentioning

confidence: 99%

A 3‐Fluoropyridine Manipulating the Aggregation and Fibril Network of Donor Polymers for Eco‐Friendly Solution‐Processed Versatile Organic Solar Cells

Jeon

Yang

Kim

et al. 2023

Small

View full text Add to dashboard Cite

The development of eco‐friendly solvent‐processed organic solar cells (OSCs) suitable for industrial‐scale production should be now considered the imperative research. Herein, asymmetric 3‐fluoropyridine (FPy) unit is used to control the aggregation and fibril network of polymer blends. Notably, terpolymer PM6(FPy = 0.2) incorporating 20% FPy in a well‐known donor polymer poly[(2,6‐(4,8‐bis(5‐(2‐ethylhexyl‐3‐fluoro)thiophen‐2‐yl)‐benzo[1,2‐b:4,5‐b’]dithiophene))‐alt‐(5,5‐(1’,3’‐di‐2‐thienyl‐5’,7’‐bis(2‐ethylhexyl)benzo[1’,2’‐c:4’,5’‐c’]dithiophene‐4,8‐dione)] (PM6) can reduce the regioregularity of the polymer backbone and endow them with much‐enhanced solubility in eco‐friendly solvents. Accordingly, the excellent adaptability for fabricating versatile devices based on PM6(FPy = 0.2) by toluene processing is demonstrated. The resulting OSCs exhibit a high power conversion efficiency (PCE) of 16.1% (17.0% by processed with chloroform) and low batch‐to‐batch variation. Moreover, by controlling the donor‐to‐acceptor weight ratio at 0.5:1.0 and 0.25:1.0, semi‐transparent OSCs (ST‐OSCs) yield significant light utilization efficiencies of 3.61% and 3.67%, respectively. For large‐area (1.0 cm2) indoor OSC (I‐OSC), a high PCE of 20.6% is achieved with an appropriate energy loss of 0.61 eV under a warm white light‐emitting diode (3,000 K) with the illumination of 958 lux. Finally, the long‐term stability of the devices is evaluated by investigating their structure–performance–stability relationship. This work provides an effective approach to realizing eco‐friendly, efficient, and stable OSCs/ST‐OSCs/I‐OSCs.

show abstract

“…Some representative polymer donors constructed with new building blocks have been reported, which improved the PCE values of non-fullerene PSCs in the last few years, such as PM6, D18, PBQx-TCl, PBNT-BDD, PBQ6, PB2F, PBDT-ODZ, D18-Fu, and PQM-Cl . To further improve the photovoltaic performance of polymer donors, terpolymerization strategy has been successfully applied for more complementary absorption spectra, more matched energy levels, and better morphology with NFAs. − Moreover, side-chain engineering has also been considered as an efficient strategy to design high-performance polymer donors because appropriate side chains lead to a more advantageous molecular orientation, a better morphology in the photoactive layer, a more effectual exciton dissociation, and higher charge mobilities. − …”

Section: Introductionmentioning

confidence: 99%

Dithienobenzoselenadiazole-Based Polymer Donors with Tuned Side Chains for Efficient Polymer Solar Cells

Tang

Ning

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Two polymer donors with dithieno[3,2-e:2′,3′-g]-2,1,3-benzoselenadiazole (DTBSe) as electron-deficient (A) units and alkylthiophene derivatives as conjugated π units between A units and electron-rich units, named as PSe-BO and PSe-HD, respectively, have been designed and synthesized, and the effects of branched alkyl side chains of alkylthiophene derivatives on molecular aggregation, photophysical properties, and photovoltaic performance have been studied. The results indicate that PSe-HD with 2-hexyldecyl side chains possesses a lower HOMO energy level, a smaller bandgap, and a more complementary absorption spectrum than PSe-BO with 2-butyloctyl side chains. Moreover, the PSe-HD:Y6 blend film also shows a better nanofibrous structure and a more orderly molecular orientation than the PSe-BO:Y6 blend film, which leads to higher charge mobility, more balanced charge transport, and less charge recombination of the former. Therefore, the polymer organic solar cell based on PSe-HD:Y6 blends achieves a higher power conversion efficiency of 14.85% than the device based on PSe-BO:Y6 blends owing to thoroughly improved photovoltaic parameters. This study provides an efficient strategy to design polymer donors by introducing DTBSe as A units and synchronously applying side-chain engineering.

show abstract

High-level periodic conjugated terpolymers through AA/BB monomer pair-type terpolymerization improve performance of polymer solar cells

Cited by 15 publications

References 49 publications

Polythiophene Derivatives for Efficient All‐Polymer Solar Cells

Polythiophene Derivatives for Efficient All‐Polymer Solar Cells

A 3‐Fluoropyridine Manipulating the Aggregation and Fibril Network of Donor Polymers for Eco‐Friendly Solution‐Processed Versatile Organic Solar Cells

Dithienobenzoselenadiazole-Based Polymer Donors with Tuned Side Chains for Efficient Polymer Solar Cells

Contact Info

Product

Resources

About