Polarized Raman Microscopy to Image Microstructure Changes in Silicon Phthalocyanine Thin‐Films DOI Creative Commons
Rosemary Cranston, Taylor D. Lanosky, Raluchukwu Ewenike

и другие.

Small Science, Год журнала: 2024, Номер 4(6)

Опубликована: Март 18, 2024

The choice of deposition technique and post treatment can significantly influence the performance organic electronic devices by altering complex relationship between film properties charge transport. Herein, method thermal annealing on thin‐film an emerging semiconductor, bis(tri‐ n ‐propylsilyl oxide) SiPc ((3PS) 2 ‐SiPc), is examined polarized Raman microscopy. Comparing physical vapor (PVD) spin‐coating, orientation (3PS) ‐SiPc molecules in films determined further characterized X‐ray diffraction to assess variations microstructure morphology due annealing. Despite differences formation, non‐annealed transistors (OTFTs) fabricated PVD spin‐coating resulted similar electron mobilities ( μ e ) order 10 −2 cm V −1 s threshold voltages T 10–20 V. Films annealed at 175 °C transition a new polymorphic form with aligned higher angle substrate exhibiting reduced device performance. Conversely, spin‐coated do not undergo any polymorph formation or structural reorganization are thus more readily able transformations structure processing, while established time deposition.

Язык: Английский

Helix-Induced Asymmetric Self-Assembly of π-Conjugated Block Copolymers: From Controlled Syntheses to Distinct Properties DOI
Na Liu,

Run‐Tan Gao,

Zong‐Quan Wu

и другие.

Accounts of Chemical Research, Год журнала: 2023, Номер 56(21), С. 2954 - 2967

Опубликована: Окт. 18, 2023

Conspectusπ-Conjugated polymers have gained significant interest because of their potential applications in optoelectronics, bioelectronics, and other domains. The controlled synthesis π-conjugated block optimizes performance enables novel properties functions. However, precise control the self-assembled architectures remains a formidable challenge. Inspired by helical biomacromolecules, supramolecular assemblies attention. Helical with an excess one-handed helicity can be optically active strong tendency toward self-assembly. Incorporating polymer into induce asymmetric assemblies, leading to chiral materials unique functionalities.To self-assembly architectures, are usually synthesized copolymers incorporating self-assembling characteristics. Although various been produced, is still challenging has rarely addressed. self-assembly, which transfers chirality polymer, resulting chiroptical functionalities. synthesizing hybrid containing two distinct blocks complicated. Some general strategies such as connecting chain ends preformed homopolymers extending prefabricated second monomer time-consuming require complex synthetic protocols. Therefore, developing for facile predictable molar mass, low dispersity, tunable composition practical importance.Recently, we investigated polyisocyanides, polyallenes, polycarbenes advanced Pd(II) Ni(II) catalysts. These were successfully incorporated polymers, including polythiophene, polyfluorene, poly(phenyleneethynylene), via one-pot sequential living polymerization monomers using Pd(II)- or Ni(II)-complexes As result, variety well-defined polymeric readily synthesized. copolymerized possess different structures mechanisms, copolymerization followed mechanism provided desired high yields narrow size distribution, composition.Remarkably, induces copolymer supramolecular, architecture optical properties. More interestingly, utilizing crystallization conjugated blocks, crystallization-driven helix-induced yielded family uniform single-handed dimensions, helicity. transfer rendered achiral emission white light over broad spectrum circularly polarized luminescence.

Язык: Английский

Процитировано

61
Simple‐Structured Acceptor with Highly Interconnected Electron‐Transport Pathway Enables High‐Efficiency Organic Solar Cells DOI
Xiaobin Gu, Rui Zeng, Tengfei He

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(23)

Опубликована: Фев. 19, 2024

Abstract Achieving desirable charge‐transport highway is of vital importance for high‐performance organic solar cells (OSCs). Here, it shown how molecular packing arrangements can be regulated via tuning the alkyl‐chain topology, thus resulting in a 3D network stacking and highly interconnected pathway electron transport simple‐structured nonfused‐ring acceptor (NFREA) with branched alkyl side‐chains. As result, record‐breaking power conversion efficiency 17.38% (certificated 16.59%) achieved NFREA‐based devices, providing an opportunity constructing low‐cost high‐efficiency OSCs.

Язык: Английский

Процитировано

32
Regulation of molecular orientation in organic solar cells DOI
Qiuju Liang,

Mingzhi Duan,

Ziqi Geng

и другие.

Chemical Engineering Journal, Год журнала: 2024, Номер 488, С. 150783 - 150783

Опубликована: Март 28, 2024

Язык: Английский

Процитировано

29
Control over the aggregated structure of donor–acceptor conjugated polymer films for high‐mobility organic field‐effect transistors DOI Creative Commons
Xinxiu Cao, Yanchun Han

Aggregate, Год журнала: 2024, Номер 5(3)

Опубликована: Янв. 15, 2024

Abstract Donor–acceptor (D‐A) conjugated polymers have demonstrated great potential in organic field‐effect transistors application, and their aggregated structure is a crucial factor for high charge mobility. However, the of D‐A polymer films complex structure–property relationship difficult to understand. This review provides an overview recent progress controlling higher mobility, including mechanisms, methods, properties. We first discuss multilevel microstructures films, then summarize current understanding between film transport Subsequently, we theory crystallization. After that, common methods control semi‐crystalline near‐amorphous such as crystallites aggregates, tie chains, alignment, attempt understand them from basic Finally, provide challenges relationship.

Язык: Английский

Процитировано

22
Tuning of the Polymeric Nanofibril Geometry via Side-Chain Interaction toward 20.1% Efficiency of Organic Solar Cells DOI
Jing Zhou, Liang Wang, Chenhao Liu

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Дек. 2, 2024

Constructing fibril morphology has been believed to be an effective method of achieving efficient exciton dissociation and charge transport in organic solar cells (OSCs). Despite emerging endeavors on the fibrillization semiconductors via chemical structural design or physical manipulation, tuning geometry, i.e., width length, for tailored optoelectronic properties remains studied depth. In this work, a series alkoxythiophene additives featuring varied alkyl side chains connected thiophene are designed modulate growth aggregates cutting-edge polymer donors PM6 D18. Molecular dynamics simulations morphological characterizations reveal that these preferentially locate near entangle with donors, which enhance conjugated backbone stacking form nanofibrils expanding from 12.6 21.8 nm length increasing 98.3 232.7 nm. This nanofibril structure is feasible acquire simultaneously. By integrating L8-BO as donor acceptor layers pseudo-bulk heterojunction (p-BHJ) OSCs layer-by-layer deposition, improvement power conversion efficiency (PCE) 18.7% 19.8% observed, contributed by enhanced light absorption, transport, reduced recombination. The versatility also verified D18:L8-BO OSCs, PCE 19.3% 20.1%, among highest values reported OSCs.

Язык: Английский

Процитировано

21
Solubilizing and stabilizing C60 with n-type polymer enables efficient inverted perovskite solar cells DOI Creative Commons
Zhou Xing,

Suxiang Ma,

Bin‐Wen Chen

и другие.

Joule, Год журнала: 2025, Номер unknown, С. 101817 - 101817

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

3
Effect of 1‐Fluoro‐2‐iodobenzene Solvent Additive on the Crystallization of Donors and Acceptors, and Ultrafast Carrier Dynamics in Polymer Solar Cells DOI
Zezhou Liang, Lihe Yan, Ning Wang

и другие.

Advanced Functional Materials, Год журнала: 2023, Номер 34(13)

Опубликована: Дек. 15, 2023

Abstract Controlled sequential crystallization of donors and acceptors is a critical factor for achieving enhanced phase separation efficient charge transfer performance in polymer solar cells (PSCs). In this study, comprehensive investigation structurally simple solvent additive, 1‐fluoro‐2‐iodobenzene (OFIB) conducted, which efficiently controls the morphology active layer, resulting fibrous assembly significantly enhancing power conversion efficiency from 16.34% to 18.38% based on PM6:L8‐BO system. Density functional theory, molecular dynamics simulations, grazing incidence small‐ wide‐angle X‐ray scattering techniques reveal that addition OFIB processed blend aligns orientation acceptor molecules, thereby overall π–π stacking layer. establishes nearly equal‐strength interactions with conjugated frameworks both donor materials, benefiting multiple electron conjugation between its iodine atom framework Femtosecond‐timescale photophysical studies demonstrate OFIB‐optimized layer shows reduced exciton losses at donor–acceptor interface. This study offers new perspective mechanism underlying function additives presents research methodology will guide development next‐generation non‐fullerene PSCs.

Язык: Английский

Процитировано

25
High Performance as‐cast Organic Solar Cells Enabled by a Refined Double‐fibril Network Morphology and Improved Dielectric Constant of Active Layer DOI
Yanan Wei,

Xianmin Zhou,

Yunhao Cai

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(28)

Опубликована: Апрель 24, 2024

Abstract High performance organic solar cells (OSCs) are usually realized by using post‐treatment and/or additive, which can induce the formation of metastable morphology, leading to unfavorable device stability. In terms industrial production, development high efficiency as‐cast OSCs is crucially important, but it remains a great challenge obtain appropriate active layer morphology and power conversion (PCE). Here, efficient constructed via introducing new polymer acceptor PY‐TPT with dielectric constant into D18:L8‐BO blend form double‐fibril network morphology. Besides, incorporation enables an enhanced lower exciton binding energy layer. Therefore, dissociation charge transport in D18:L8‐BO:PY‐TPT‐based device, affording record‐high PCE 18.60% excellent photostability absence post‐treatment. Moreover, green solvent‐processed devices, thick‐film (300 nm) module (16.60 cm 2 ) fabricated, show PCEs 17.45%, 17.54%, 13.84%, respectively. This work brings insight construction pushing forward practical application OSCs.

Язык: Английский

Процитировано

17
Enhancing the Thermoelectric Properties of Conjugated Polymers by Suppressing Dopant‐Induced Disorder DOI Creative Commons
Suhao Wang, Wenjin Zhu, Ian E. Jacobs

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(25)

Опубликована: Апрель 1, 2024

Abstract Doping is a crucial strategy to enhance the performance of various organic electronic devices. However, in many cases, random distribution dopants conjugated polymers leads disruption polymer microstructure, severely constraining achievable Here, it shown that by ion‐exchange doping polythiophene‐based P[(3HT) 1‐x ‐stat‐(T) x ] ( = 0 (P1), 0.12 (P2), 0.24 (P3), and 0.36 (P4)), remarkably high electrical conductivity >400 S cm −1 power factor >16 µW m K −2 are achieved for copolymer P3, ranking among highest ever reported unaligned P3HT‐based films, significantly higher than P1 (<40 , <4 ). Although both exhibit comparable field‐effect transistor hole mobilities ≈0.1 2 V s pristine state, after doping, Hall effect measurements indicate P3 exhibits large mobility up 1.2 outperforming (0.06 GIWAXS measurement determines in‐plane π – stacking distance doped 3.44 Å, distinctly shorter (3.68 Å). These findings contribute resolving long‐standing dopant‐induced‐disorder issues P3HT serve as an example achieving fast charge transport highly efficient electronics.

Язык: Английский

Процитировано

15
Equally high efficiencies of organic solar cells processed from different solvents reveal key factors for morphology control DOI Creative Commons
Rui Zhang, Haiyang Chen, Tonghui Wang

и другие.

Nature Energy, Год журнала: 2024, Номер unknown

Опубликована: Дек. 4, 2024

Abstract The power conversion efficiency of organic solar cells (OSCs) is exceeding 20%, an advance in which morphology optimization has played a significant role. It generally accepted that the processing solvent (or mixture) can help optimize morphology, impacting OSC efficiency. Here we develop OSCs show strong tolerance to range solvents, with all devices delivering high efficiencies around 19%. By investigating solution states, film formation dynamics and characteristics processed films both experimentally computationally, identify key factors control is, interactions between side chains acceptor materials as well donor materials. Our work provides new understanding on long-standing question effective guides design towards practical applications, where green solvents are required for large-scale processing.

Язык: Английский

Процитировано

13