Feasibility of p-doped molecular crystals as transparent conductive electrodes via virtual screening

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Nematiaram, Tahereh and Troisi, Alessandro (2022) Feasibility of p-doped molecular crystals as transparent conductive electrodes via virtual screening. Chemistry of Materials, 34 (9). 4050–4061. ISSN 0897-4756 (https://doi.org/10.1021/acs.chemmater.2c00281)

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Abstract

Transparent conducting materials are an essential component of optoelectronic devices. It is proven difficult, however, to develop high-performance materials that combine the often-incompatible properties of transparency and conductivity, especially for p-type-doped materials. In this work, we have employed a large set of molecular semiconductors extracted from the Cambridge Structural Database to evaluate the likelihood of transparent conducting material technology based on p-type-doped molecular crystals. Candidates are identified imposing the condition of high highest occupied molecular orbital (HOMO) energy level (for the material to be easily dopable), high charge carrier mobility (for the material to display large conductivity when doped), and a high threshold for energy absorption (for the material to absorb radiation only in the ultraviolet). The latest condition is found to be the most stringent criterion in a virtual screening protocol on a database composed of structures with sufficiently wide two-dimensional (2D) electronic bands. Calculation of excited-state energy is shown to be essential as the HOMO–lowest unoccupied molecular orbital (LUMO) gap cannot be reliably used to predict the transparency of this material class. Molecular semiconductors with desirable mobility are transparent because they display either forbidden electronic transition(s) to the lower excited states or small exchange energy between the frontier orbitals. Both features are difficult to design but can be found in a good number of compounds through virtual screening.

ORCID iDs

Nematiaram, Tahereh ORCID logoORCID: https://orcid.org/0000-0002-0371-4047 and Troisi, Alessandro;
  • Item type:Article
    ID code:83734
    Dates:
    Date
    Event
    10 May 2022
    Published
    25 April 2022
    Published Online
    14 April 2022
    Accepted
    Subjects:Science > Chemistry
    Department:Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:16 Jan 2023 16:27
    Last modified:11 Nov 2024 13:45
    URI:https://strathprints.strath.ac.uk/id/eprint/83734
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