A5039059538- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Thin-Film Transistor Technologies
- Semiconductor materials and interfaces
- Bluetooth and Wireless Communication Technologies
- Silicon and Solar Cell Technologies
- Wireless Body Area Networks
- Antenna Design and Analysis
- Molecular Junctions and Nanostructures
- Organoselenium and organotellurium chemistry
- Organic Light-Emitting Diodes Research
- Organic and Molecular Conductors Research
- Liquid Crystal Research Advancements
- Wireless Power Transfer Systems
- Nanowire Synthesis and Applications
- Organic Chemistry Cycloaddition Reactions
Hong Kong University of Science and Technology
2023-2025
University of Hong Kong
2023-2025
Xi’an Jiaotong-Liverpool University
2021
Abstract With plenty of popular and effective ternary organic solar cells (OSCs) construction strategies proposed applied, its power conversion efficiencies (PCEs) have come to a new level over 19% in single-junction devices. However, previous studies are heavily based chloroform (CF) leaving behind substantial knowledge deficiencies understanding the influence solvent choice when introducing third component. Herein, we present case where newly designed asymmetric small molecular acceptor...
A strong electron-deficient unit CNPz as a solid additive was developed in PTQ10/ m -BTP-PhC6 binary organic solar cells. high PCE of 19.67% achieved with significant increase the J SC and FF (81.8%).
The exploration of high-performance and low-cost wide-bandgap polymer donors remains critical to achieve high-efficiency nonfullerene organic solar cells (OSCs) beyond current thresholds. Herein, the 1,2,3-benzothiadiazole (iBT), which is an isomer 2,1,3-benzothiadiazole (BT), used design donor PiBT. PiBT-based reach efficiency 19.0%, one highest efficiencies in binary OSCs. Systemic studies show that isomerization BT iBT can finely regulate polymers' photoelectric properties including i)...
Abstract Herein, two emerging device optimization methods, solid additive and layer‐by‐layer (LBL) process, for organic solar cells (OSCs) are simultaneously studied. Through traditional blend cast recently proposed identical solvent LBL cast, BDCB (2‐monobromo‐1,3‐dichloro‐bezene), a benzene derivative, is used to improve the performance based on celebrity combination PM6:L8‐BO. The results reveal that finely optimized concentration in PM6 solution can push efficiency of 19.03% compared...
Open AccessCCS ChemistryRESEARCH ARTICLES30 Jun 2024Molecular Skeletons Modification Induces Distinctive Aggregation Behaviors and Boosts the Efficiency Over 19% in Organic Solar Cells Hanjian Lai, Xue Yongwen Lang, Yongmin Luo, Liang Han, Yulin Zhu, Shilong Xiong, Xiangyu Shen, Yafei Ding, jiaying Wu, Gang Li Feng He Lai , Lang Luo Han Zhu Xiong Shen Ding Wu https://doi.org/10.31635/ccschem.024.202404482 SectionsSupplemental MaterialAboutPDF ToolsAdd to favoritesDownload CitationsTrack...
Abstract Organic solar cell (OSC) development continues to demonstrate impressive device efficiency improvements. However, the materials synthetic simplicity essential industrialization remains seriously lacking attention, imparting inferior performance records in low‐cost devices. Hence, low bandgap and completely non‐fused electron acceptors (CNFEAs) having simple molecular structures are investigated herein. In contrast typically explored fused‐ring with smaller backbone conformational...
Abstract Low cost and printing friendly fabrication of organic solar cells (OSCs) require thick‐film devices with simply structured photoactive molecules. Thus, achieving high power conversion efficiency (PCE) for non‐fused ring acceptor‐based thickness is great significance. Herein, by transforming traditional blend casting method to emerging sequential deposition (SD) method, D18:A4T‐16 active exhibits large improvement from 8.02% 14.75% in 300 nm thick devices. Systematic morphological...
Abstract This study focuses on the synthesis and performance of non‐fullerene acceptors (NFAs) with varying chlorine dispersion in organic solar cells (OSCs). Four chlorine‐mediated acceptors, BO3Cl‐ a , γ β BOEH3Cl‐ are synthesized isomeric terminal groups then integrated donor PBDB‐TF to fabricate OSCs. It finds that increased improves device efficiency enhanced current ‐based devices achieving power conversion (PCE) over 19%, which is one highest values reported for asymmetrically...
Most high-performing dimerized acceptors are based on Y-series precursors with superior conjugated π-backbones. The utilization of branch-connected can fully leverage the four end groups to enhance molecular packing, thereby potentially improving both stability organic solar cells (OSCs) while maintaining high power conversion efficiency (PCE). Therefore, optimizing linker is critical realizing their potential in device performance. In this study, three synthesized and conjugation-break...
Energy loss (Eloss) between optical energy gap (Eg) and open‐circuit voltage (eVoc) sets efficiency upper limits for organic solar cells (OSCs). Nevertheless, further breaking the limit of Eloss in OSCs is challenging, especially via structurally simple materials binary OSCs. Herein, a non‐halogenated polymer donor, namely PBDCT, developed realizing high‐efficiency with record‐breaking Eloss. The critical building block 3,4‐dicyanothiophene high electron affinity results deep‐lying highest...
Energy loss (Eloss) between optical energy gap (Eg) and open-circuit voltage (eVoc) sets efficiency upper limits for organic solar cells (OSCs). Nevertheless, further breaking the limit of Eloss in OSCs is challenging, especially via structurally simple materials binary OSCs. Herein, a non-halogenated polymer donor, namely PBDCT, developed realizing high-efficiency with record-breaking Eloss. The critical building block 3,4-dicyanothiophene high electron affinity results deep-lying highest...
Abstract Boosting power conversion efficiency (PCE) of organic solar cells (OSCs) has been restricted by its undesirably high energy loss, especially for those nonhalogenated solvent‐processed ones. Here,a dichloro‐methoxylated terminal group in an asymmetric small molecular acceptor design, which realizes a significantly reduced non‐radiative loss (0.179 eV) compared to symmetric counterpart (0.202 eV), is reported. Consequently, the device improved up 20% PM6:BTP‐eC9‐4ClO, without...
Abstract Near‐infrared (NIR) organic photodetectors (OPDs), particularly all‐polymer‐based ones, hold substantial commercial promise in the healthcare and imaging sectors. However, process of optimizing their active layer composition to achieve highly competitive figures merit lacks a clear direction methodology. In this work, celebrity polymer acceptor PY‐IT into more NIR absorbing host system PBDB‐T:PZF‐V, significantly enhance photodetection competence, is introduced. The refined...
Abstract Single‐component organic solar cells based on double cable polymers have achieved remarkable performance, with DCPY2 reaching a high efficiency of over 13%. In this study, is further optimized an 13.85%, maintaining fill factor (FF) without compromising the short circuit current. Despite its intermixed morphology, shows reduced recombination rate compared to their binary counterpart (PBDB‐T:Y‐O6). This slower in attributed wavefunction overlap delocalized charges, by spatially...
Abstract Pursuing power conversion efficiency (PCE) is the priority of developing organic solar cells (OSCs) based on low‐cost completely non‐fused ring acceptors. Herein, a donor/acceptor re‐intermixing strategy to enhance photon capturing process, previously established well‐stratified active layer morphology reported. By adding 20 wt% PTQ10 (polymer donor) into acceptor's precursor, device PCE increased 16.03% from 15.11% D18/A4T‐16 control system, which attributed additional charge...
Polymer donors with aromatic fused rings are considered as significance in reaching efficient non-fullerene organic solar cells (OSCs). In this contribution, a novel electron-withdrawing motif naphtho[1,2-c:5,6-c']bis([1,2,3]thiadiazole) (iNT) is developed...
Abstract Although encouraging progress in spin‐coated small‐area organic solar cells (OSCs), reducing efficiency loss caused by differences film uniformity and morphology when up‐scaled to large‐area modules through meniscus‐guided coating is an important but unsolved issue. In this work, in‐depth research conducted on the influence of both liquid solid additives active layer blade‐coated PM6:L8‐BO binary system. The study reveals that high boiling point like 1,8‐diiodooctane (DIO) used...
Giant molecule acceptors (GMAs) have gained considerable attention due to their exceptional device stability, repeatability, and high power conversion efficiency (PCE). In this work, we synthesized isomerized electron-deficient linkers (trans-ICI cis-ICI), containing two active methylenes, employed them design GMAs. These were then used synthesize A-DA′D-A type GMAs (DY-cis-ICI DY-trans-ICI) through a metal-free catalytic Knoevenagel condensation reaction, serving as an alternative the...
Abstract The electron‐deficient A 1 unit in A‐DA D‐A structured acceptors is critical for optimizing the efficiency of organic solar cells (OSCs). Drawing inspiration from high performance previously reported pyrido[2,3‐ b ]quinoxaline‐core acceptors, Py6, an isomer Py1 designed with a repositioned pyridine nitrogen atom, and further modified it by chlorinating Py6 to create Py7. Theoretical calculations show that chlorine incorporation strengthens intermolecular non‐covalent interactions...