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Molecules
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Nanomaterials in Photoelectrochemistry
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Nanomaterials in Photoelectrochemistry

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

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 2625

Special Issue Editor

Prof. Dr. Kaiying Wang

E-Mail Website
Guest Editor
Department of Microsystems, University of South-Eastern Norway, Horten, Norway
Interests: nanomaterials; micro/nanofabrication technique; photoelectrochemistry/photohemistry; energy conversion; MEMS sensors

Special Issue Information

Dear Colleagues,

Photoelectrochemistry is a chemical process that integrates incident light into an electrochemical reaction. In this electrochemical reaction, the photon-excited semiconductive substances (so-called electrodes, normally with nanostructures) absorb photon energy and converted photoenergy into electron–hole pairs, then are separated and transported to the electrode surface to induce chemical reactions such as, for example, oxidation, reduction, or polymerization. Although photoelectrochemical processes are widely used in chemical engineering fields, their fundamental mechanisms, experimental techniques, engineering methods, and potential applications must be further investigated. Therefore, this Special Issue, “Nanomaterials in Photoelectrochemistry”, is planning to publish current state-of-the-art photoelectrochemistry papers ranging from those furthering academic knowledge to those on technical development, including reviews, research papers, and technical development notes. The contributed papers may be focused on the following topics:

  • Various developments in calculation and modeling of photon-excited substances for photoelectrochemical/photochemical processes.
  • Experimental research results related to photo-excited substances for photoelectrochemical/photochemical processes, such as in gas, liquid, or solid phases.
  • Photoelectrochemical/photochemical research related to water splitting, CO2 conversion, pollutant degradation, sterilization, drug synthesis, etc.
  • Various reaction engineering studies at macro/micro scale as well as sensor principles or fabrication based on photoelectrochemical/photochemical principles.

Prof. Dr. Kaiying Wang
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

  • nanomaterials
  • photoelectrochemical/photochemical
  • energy conversion and storage
  • CO2 and small-molecule conversion
  • hydrogen generation
  • sensing applications

Published Papers (1 paper)

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Research

23 pages, 46106 KiB  
Article
Exploring the Effect of Ammonium Iodide Salts Employed in Multication Perovskite Solar Cells with a Carbon Electrode
by Maria Bidikoudi, Carmen Simal, Vasillios Dracopoulos and Elias Stathatos
Molecules 2021, 26(19), 5737; https://0-doi-org.brum.beds.ac.uk/10.3390/molecules26195737 - 22 Sep 2021
Cited by 8 | Viewed by 2233
Abstract
Perovskite solar cells that use carbon (C) as a replacement of the typical metal electrodes, which are most commonly employed, have received growing interest over the past years, owing to their low cost, ease of fabrication and high stability under ambient conditions. Even [...] Read more.
Perovskite solar cells that use carbon (C) as a replacement of the typical metal electrodes, which are most commonly employed, have received growing interest over the past years, owing to their low cost, ease of fabrication and high stability under ambient conditions. Even though Power Conversion Efficiencies (PCEs) have increased over the years, there is still room for improvement, in order to compete with metal-based devices, which exceed 25% efficiency. With the scope of increasing the PCE of Carbon based Perovskite Solar Cells (C-PSCs), in this work we have employed a series of ammonium iodides (ammonium iodide, ethylammonium iodide, tetrabutyl ammonium iodide, phenethylammonium iodide and 5-ammonium valeric acid iodide) as additives in the multiple cation-mixed halide perovskite precursor solution. This has led to a significant increase in the PCE of the corresponding devices, by having a positive impact on the photocurrent values obtained, which exhibited an increase exceeding 20%, from 19.8 mA/cm2, for the reference perovskite, to 24 mA/cm2, for the additive-based perovskite. At the same time, the ammonium iodide salts were used in a post-treatment method. By passivating the defects, which provide charge recombination centers, an improved performance of the C-PSCs has been achieved, with enhanced FF values reaching 59%, which is a promising result for C-PSCs, and Voc values up to 850 mV. By combining the results of these parallel investigations, C-PSCs of the triple mesoscopic structure with a PCE exceeding 10% have been achieved, while the in-depth investigation of the effects of ammonium iodides in this PSC structure provide a fruitful insight towards the optimum exploitation of interface and bulk engineering, for high efficiency and stable C-PSCs, with a structure that is favorable for large area applications. Full article
(This article belongs to the Special Issue Nanomaterials in Photoelectrochemistry)
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