Kilwon Cho

Quantum Dot-Induced Kinetic Bottleneck in Singlet Exciton Relaxation of Conjugated Polymer Aggregates

Yeon Gyu Kim, Se Gyo Han, Minyoung Jeong, Taeyong Ha et autres

Abstract We designed hybrid aggregate model systems with cascade energy alignment from conjugated polymers (CPs) to quantum dots (QDs) to investigate the effects of QDs on CP singlet (S1) excitons. Radiative recombination of S1 excitons occurs within 1 ps in the chlorinated …

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A Binary Cathode Interlayer Coupling Dipole Regulation and Molecular Orientation Enables 20.1%‐Efficient Organic Solar Cells

Xinqiang Zhu, Xin Li, Sein Chung, Byeongchan Park et autres

The performance of organic solar cells is critically influenced by electron extraction at the cathode interface, which is often limited by suboptimal energy alignment and disordered molecular packing in the cathode interlayer. Here, we demonstrate that synergistic coupling between interfacial dipole engineering …

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Synergistic Energetics and Exciton Management Driven by Interfacial Dipoles Enable 20.1% Efficient Organic Solar Cells

Xin Li, Luo Huang, Sein Chung, Anhai Liang et autres

Poly(3,4ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS, PP) is widely employed as a hole-transport layer in organic solar cells due to its optical transparency and solution-processability. However, PP application is often hindered by non-radiative recombination arising from interfacial energy-level misalignment, charge trapping, and suboptimal compatibility with the …

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Cosolvent-Modulated Donor Preaggregation Enhances Molecular Order in 20% Efficient Bilayer Organic Solar Cells

Wei Pang, Sein Chung, Jiancheng Zhong, Guanlin Chen et autres

Solvent selection critically modulates the aggregation behavior within the active layer, ultimately determining the performance of bilayer organic solar cells (OSCs). However, good solvents (e.g., chloroform and chlorobenzene) for polymer donors typically exhibit moderate boiling points, which suppress rapid aggregation, resulting in …

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20.46% efficient organic solar cells with concurrent voltage enhancement and thermal stability enabled by crystallization-kinetics-controlled morphology

Anhai Liang, Chunliang Li, Bosen Zou, Sein Chung et autres

Incorporating BTP-FCIO extends the acceptor phase nucleation time from 132 ms to 199 ms and enhances the efficiency to 20.46%. This ternary strategy demonstrates consistent effectiveness across multiple representative Y-series acceptors.

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Sulfur-Functionalized MXene Interphases for Regulating Interfacial Zn Chemistry toward Stable Aqueous Zn-Metal Batteries

Cheng Jin An, Haolun Wang, Jihan Liu, Shan Yang et autres

High‐Performance n‐Type Thermoelectric Polymers via Ion‐Exchange Tuning of Polaron–Cation Interactions

Hojun Ji, Eunsol Ok, Hyunji Lee, Giwon Lee et autres

Abstract The thermoelectric (TE) properties of the n‐type conjugated polymer (CP) polybenzodifuran‐dione (PBFDO) are systematically modulated via counter‐ion exchange, in which protons initially present as the counter‐ion are replaced with various cations of increasing ionic radius. Ion exchange varied polaron‐cation coupling, macroscopic …

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Modulating reorganization energy by tuning spectral overlap to reduce energy loss in bilayer organic solar cells

Yuan Liu, Jianan Zheng, Zhenmin Zhao, Sein Chung et autres

Abstract Organic solar cells (OSCs) have achieved remarkable power conversion efficiency (PCE) close to 21%. This is attained mainly by suppressing energy losses, which is closely tied to the reorganization energy (RE). However, the explicit role of RE on the open circuit …

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Tailoring Molecular Orientation with a Polymer Additive Enables Bilayer Organic Solar Cells with 20.2% Efficiency

Zhenmin Zhao, Sein Chung, Jiancheng Zhong, Xuemeng Yu et autres

Abstract Tuning the molecular packing from the edge‐on to the preferred face‐on orientation is beneficial for improving vertical charge transport and the photovoltaic performance in organic solar cells. However, achieving precise control over this structural transition remains a significant challenge due to …

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Quinoidal Nitrogen‐Bridged Terthiophene Acceptors Enabling Broadband Spectral Response Reaching 1.4 µm in SWIR Organic Photodetectors

Shabaz Alam, Se Jeong Park, Meng Qiang Li, Suhui Sim et autres

Abstract Organic photodetectors (OPDs) capable of detecting short‐wavelength infrared (SWIR) radiation beyond the silicon cutoff (≈1.1 µm) have attracted significant attention due to their potential applications, such as machine vision, remote sensing, medical imaging, artificial intelligence, etc. However, designing organic materials with …

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Synergistic Design of Superhydrophilic In@Zn@Cu NW@Cu Foam Anode for High‐Performance Zinc‐Ion Batteries

Hui Zhi, Yemao Da, Zhe Chen, Xiaohan Li et autres

Abstract The development of Zn‐based anodes for aqueous Zn‐ion batteries has attracted significant attention due to the high capacity of Zn, its low cost, environmental friendliness, and safety. However, dendrite formation and hydrogen evolution reactions (HERs) during Zn plating and stripping pose …

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Guidelines for accurate evaluation of photodetectors based on emerging semiconductor technologies

Vincenzo Pecunia, Thomas D. Anthopoulos, Ardalan Armin, Benjamin Bouthinon et autres

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