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Das D, Shinde SL, Nanda KK. Temperature-Dependent Photoluminescence of g-C3N4: Implication for Temperature Sensing. ACS Appl Mater Interfaces. 2016;8(3):2181-6doi: 10.1021/acsami.5b10770.
Das, D., Shinde, S. L., & Nanda, K. K. (2016). Temperature-Dependent Photoluminescence of g-C3N4: Implication for Temperature Sensing. ACS applied materials & interfaces, 8(3), 2181-6. https://doi.org/10.1021/acsami.5b10770
Das, Debanjan, et al. "Temperature-Dependent Photoluminescence of g-C3N4: Implication for Temperature Sensing." ACS applied materials & interfaces vol. 8,3 (2016): 2181-6. doi: https://doi.org/10.1021/acsami.5b10770
Das D, Shinde SL, Nanda KK. Temperature-Dependent Photoluminescence of g-C3N4: Implication for Temperature Sensing. ACS Appl Mater Interfaces. 2016 Jan 27;8(3):2181-6. doi: 10.1021/acsami.5b10770. Epub 2016 Jan 12. PMID: 26714053.
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ACS Appl Mater Interfaces. 2016 Jan 27;8(3):2181-6. doi: 10.1021/acsami.5b10770. Epub 2016 Jan 12.

Temperature-Dependent Photoluminescence of g-C3N4: Implication for Temperature Sensing.

ACS applied materials & interfaces

Debanjan Das, S L Shinde, K K Nanda

Affiliations

  1. Materials Research Centre, Indian Institute of Science , Bangalore 560012, India.

PMID: 26714053 DOI: 10.1021/acsami.5b10770

Abstract

We report the temperature-dependent photoluminescence (PL) properties of polymeric graphite-like carbon nitride (g-C3N4) and a methodology for the determination of quantum efficiency along with the activation energy. The PL is shown to originate from three different pathways of transitions: σ*-LP, π*-LP, and π*-π, respectively. The overall activation energy is found to be ∼73.58 meV which is much lower than the exciton binding energy reported theoretically but ideal for highly sensitive wide-range temperature sensing. The quantum yield derived from the PL data is 23.3%, whereas the absolute quantum yield is 5.3%. We propose that the temperature-dependent PL can be exploited for the evaluation of the temperature dependency of quantum yield as well as for temperature sensing. Our analysis further indicates that g-C3N4 is well-suited for wide-range temperature sensing.

Keywords: activation energy; nitride; photoluminescence; quantum efficiency; sensing

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