Shamrock-shaped Nonfullerene Acceptors Containing Nonhalogenated End Groups for High-Voltage Organic Photovoltaics

Dyes and Pigments, Journal Year: 2025, Volume and Issue: 235, P. 112616 - 112616

Published: Jan. 2, 2025

Language: Английский

---

Leveraging Multilayer Hole Selective Layers to Boost Organic Photovoltaic Power Conversion Efficiency

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Hole selective layers (HSLs) play a crucial role in the efficiency of organic photovoltaics (OPVs). Self-assembled monolayers (SAMs) offer powerful approach to engineer interfacial properties HSLs OPVs. In this work, we utilized 2-(9H-carbazol-9-yl)ethyl)phosphonic acid (2PACz) SAM modify ITO/MoO3 interface and surface MoO3, thereby forming multilayer HSLs. 2PACz regulates work function (WF) electrodes, leading more favorable energy level alignment, reduced resistance, facilitated charge carrier transport extraction. The resulting OPV devices demonstrated improved fill factor (FF) power conversion (PCE). Additionally, reduction defects effectively suppressed recombination, ultimately achieving maximum PCE 16.33%. This indicates that design composite with modification is an effective strategy for improving provides ideas further advancing development.

Language: Английский

---

Mitigating the Energy Loss in Ternary Organic Photovoltaics with a Conjugated Terpolymer

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

We investigated the performance of a terpolymer, PM1, as third component in two donor–one acceptor-based ternary organic photovoltaics (OPVs). derivative PM6, incorporates 20% thiophene-thiazolothiazole (TTz) monomers, expanding its structural diversity and featuring lower highest occupied molecular orbital (HOMO) energy level compared to that PM6. To investigate impact we fabricated p–i–n-structured OPVs with following layer configuration: ITO/PEDOT:PSS/PM6:Y6 (or BTP-eC9) or without PM1/PFN-Br/Ag. By examining miscibility blend film morphology, explored how these factors influence carrier dynamics ultimately OPV performance. The high compatibility between PM1 PM6 (χPM6-PM1 = 0.003) facilitated formation well-mixed donor phase, akin an alloy. This homogeneous promoted efficient charge transport suppressed trap-assisted recombination within film. Consequently, PM1-based exhibited reduced nonradiative recombination, leading increased open-circuit voltage (VOC) overall device efficiency. optimal power conversion efficiencies using Y6 BTP-eC9 acceptors reached 17.09 17.60%, respectively. Our findings highlight potential terpolymers promising materials for OPVs, paving way innovative polymer design strategies.

Language: Английский

---

Improving photovoltaic performance of organic solar cells utilizing medium bandgap BODIPY non-fused acceptor as third Component via ternary strategy

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: unknown, P. 141977 - 141977

Published: March 1, 2025

Language: Английский

---

Medium‐Bandgap Acceptors for Efficient Ternary Organic Solar Cells Achieved by End‐Group Engineering

Solar RRL, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

The ternary strategy has been evidenced as one of the most crucial methods to improve photovoltaic performance organic solar cells. However, selection and design third components are decisive factors facilitating progress cells (TOSCs). In this study, focuses concentrated on D18‐Cl:N3 binary host device by developing a weakly electron‐withdrawing end group synthesizing guest acceptor, BTP‐CM, which holds similar backbone N3. structure resemblance ensures good compatibility molecule with N3, improves charge transport reduces recombination. Thereby, D18‐Cl:N3:BTP‐CM‐based TOSC exhibits an improved power conversion efficiency 18.32%, compared 17.13% device. This work provides effective for acceptors, aims introduce new groups obtain molecules complementary absorptions matched energy levels while preserving molecular acceptor.

Language: Английский

---

Advancements in morphology controllable ternary organic solar cells for active layers

Renewable and Sustainable Energy Reviews, Journal Year: 2025, Volume and Issue: 216, P. 115673 - 115673

Published: April 8, 2025

Language: Английский

---

Electrical and Optical Properties Depending on the Substitution Position of a Novel Indolocarbazole Dimer

Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 2058 - 2058

Published: April 30, 2025

Two innovative dimeric derivatives of indolo[3,2,1-jk]carbazole (ICz), named 7,7'-biindolo[3,2,1-jk]carbazole (ICzDO) and 4,4'-biindolo[3,2,1-jk]carbazole (ICzDM), have been developed. Both dimers consist two ICz units coupled through distinct ortho meta positions. In the solution state, ICzDO ICzDM exhibited photoluminescence (PL) maxima at 379 nm 391 nm, demonstrating emission in deep-blue region. These compounds show exceptionally narrow spectra, characterized by full width half maximum (FWHM) 28 for 26 ICzDM. film a 428 whereas showed red-shifted 507 with broad 87 indicating significant excimer characteristics. This is attributed to its aggregation-enhanced (AEEE) When used as host materials red phosphorescent OLEDs, both enabled efficient energy transfer. Devices using attained highly external quantum efficiency (EQE) values 13.5%, remarkable color purity represented Commission Internationale de l'Éclairage (CIE) coordinates (0.685, 0.314). findings emphasize how strategic variations linking positions identical chromophores can markedly enhance OLED device performance, paving way material designs next-generation organic semiconductor technologies.

Language: Английский

---

Dimerized Non-Fullerene Acceptor-based organic photovoltaics for Round-the-Clock functioning

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157013 - 157013

Published: Oct. 1, 2024

Language: Английский

---