Exfoliated and evaporated thin films of graphitic carbon nitride (g-C3N4): Evolution of photoelectronic properties from bulk

Autor:	Purna Chandra Patra, Y. N. Mohapatra
Rok vydání:	2021
Předmět:	Materials science Photoluminescence Band gap Phonon Mechanical Engineering High intensity Analytical chemistry Graphitic carbon nitride Condensed Matter Physics Spectral line chemistry.chemical_compound chemistry Mechanics of Materials General Materials Science Thin film Spectroscopy
Zdroj:	Materials Letters. 302:130374
ISSN:	0167-577X
DOI:	10.1016/j.matlet.2021.130374
Popis:	Photoelectronic properties of polymeric graphitic carbon nitride (g-C3N4) are not well understood, especially in its different structural forms. We study the evolution of optical properties of three forms viz. bulk, chemically exfoliated layers and thin films. The optical bandgap of bulk g-C3N4 is 2.85 eV, and it increases for exfoliated samples. Photoluminescence (PL) is studied in detail by carefully analyzing the line spectra for all three forms. In all cases, the high intensity peak is excitonic in nature, with two other peaks attributed to its phonon replicas. Time resolved photoluminescence (TRPL) spectroscopy shows a double exponential decay irrespective of the different forms of g-C3N4.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::436ea8769cb194a7c0d141d6648297ff https://doi.org/10.1016/j.matlet.2021.130374 Zobrazit plný text záznamu Full Text from ScienceDirect