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Molecules
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Progress and Challenges in Organic Optoelectronic Functional Materials
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Progress and Challenges in Organic Optoelectronic Functional Materials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Cross-Field Chemistry".

Deadline for manuscript submissions: 31 July 2025 | Viewed by 1052

Special Issue Editor

Dr. Hongli Liu

E-Mail Website
Guest Editor
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Interests: organic optoelectronic functional materials; including organic light-emitting diode; quantum dot light emitting diodes; perovskite solar cell

Special Issue Information

Dear Colleagues,

The phrase ‘organic photoelectric materials’ refers to organic materials with photoelectric conversion function and photoelectric activity. Widely used in organic light-emitting diodes, organic transistors, organic solar cells and other fields, they are rich in carbon atoms with large π-conjugated systems, which are divided into small molecules and polymers. Compared with inorganic materials, organic photoelectric materials can achieve large-area preparation and flexible device preparation via solution methods. In addition, organic materials possess a diverse structural composition and a wide space for performance adjustment. This can help to obtain the required properties via molecular design and can prepare nanodevices and molecular devices through bottom-up device assembly methods such as self-assembly. Organic photoelectric functional materials include hole transport materials, fluorescent materials, electron transport materials, polymer photoelectric conversion materials, small-molecule luminous materials, and modified polymer photoelectric conversion materials. In recent years, the subject of optical information material science, which has great significance in the information science and IT industry, has been developed on this basis.

This Special Issue’s scope includes organic chemistry, material science and physical chemistry. There is no restriction on the maximum length of the papers. Full experimental details must be provided so that the results can be reproduced. In addition, the availability of compound samples should be published and is considered important information, and authors are encouraged to register or deposit their chemical samples.

Dr. Hongli Liu
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • organic photoelectric materials
  • photoelectric device
  • small-molecule luminous materials
  • photoelectric conversion materials
  • dyes and pigments
  • organic electroluminescent materials
  • fluorescent probe
  • organic synthesis

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Published Papers (1 paper)

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Research

18 pages, 2986 KiB  
Article
Influence of Electrolyte Composition on the Semiconductor–Electrolyte Interface (SEI) Built-In for Enhanced Photoelectrochemical (PEC) Processes
by Bartłomiej Leks, Aleksandra Parzuch, Nabila Nawaz, Justyna Widera-Kalinowska, Krzysztof Bienkowski and Renata Solarska
Molecules 2025, 30(4), 885; https://doi.org/10.3390/molecules30040885 - 14 Feb 2025
Viewed by 647
Abstract
The relentless consumption of fossil fuels and soaring CO2 emissions have plunged the world into an energy and environmental crisis. As society grapples with these challenges, the demand for clean, renewable, and sustainable energy solutions has never been more urgent. However, even [...] Read more.
The relentless consumption of fossil fuels and soaring CO2 emissions have plunged the world into an energy and environmental crisis. As society grapples with these challenges, the demand for clean, renewable, and sustainable energy solutions has never been more urgent. However, even though many efforts have been made in this field, there is still room for improvement concerning efficiency, material stability, and catalytic enhancement regarding kinetics and selectivity of photoelectrochemical (PEC) processes. Herein, we provide the experimental proof for the enhancement of the photocurrent efficiency by the critical focus on semiconductor–electrolyte interface (SEI) properties. By tailoring electrolyte composition, researchers can unlock significant improvements in catalytic efficiency and stability, paving the way for advanced PEC technologies. In this study, we investigate the influence of electrolyte composition on SEI properties and its impact on PEC performance. By employing electrolytes enriched with carbonates, borates, sulphates, and alkali cations, we demonstrate their profound role in optimising photoelectrochemical CO2 reduction reaction (CO2RR) efficiency. Central to this work is Cu2O—an affordable, highly promising photocatalyst. While its potential is undeniable, Cu2O’s inherent instability and diverse reduction products, ranging from CH3OH to CO, HCOOH, CH3COOH, and CH3CH2OH, have hindered its widespread adoption in PEC CO2 reduction (CO2RR). Our approach leverages a straightforward yet powerful electrodeposition method, enabling a deeper exploration of SEI dynamics during photocatalysis. Key parameters, such as carbonate concentration, local pH, alkali cation presence, anionic geometry, CO2 solubility, and electrolyte conductivity, are systematically investigated. The findings reveal the formation of a unique “rigid layer” at the photocatalyst surface, driven by specific cation–anion interactions. This rigid layer plays a pivotal role in boosting PEC performance, offering a new perspective on optimising, among other PEC processes, CO2RR catalytic efficiency. This profound study bridges a critical knowledge gap, shedding light on the dual influence of cations and anions on SEI properties and PEC CO2RR. By unravelling these intricate interactions, we provide a roadmap for designing next-generation PEC systems. These insights pave the way for sustainable energy advancements, inspiring innovative strategies to tackle one of the most pressing challenges of our time. Full article
(This article belongs to the Special Issue Progress and Challenges in Organic Optoelectronic Functional Materials)
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