Supramolecular Copolymerization Strategy for Realizing the Broadband White Light Luminescence Based on N-Deficient Porous Graphitic Carbon Nitride (g-C3N4)

Wenhua Tang; Ying Tian; BoWen Chen; Yayan Xu; Bingpeng Li; Xufeng Jing; Junjie Zhang; Shiqing Xu

doi:10.1021/acsami.9b19338

Supramolecular Copolymerization Strategy for Realizing the Broadband White Light Luminescence Based on N-Deficient Porous Graphitic Carbon Nitride (g-C₃N₄)

ACS Appl Mater Interfaces. 2020 Feb 5;12(5):6396-6406. doi: 10.1021/acsami.9b19338. Epub 2020 Jan 22.

Authors

Wenhua Tang¹, Ying Tian¹, BoWen Chen², Yayan Xu¹, Bingpeng Li¹, Xufeng Jing², Junjie Zhang¹, Shiqing Xu¹

Affiliations

¹ Institute of Photoelectric Materials and Devices , China Jiliang University , Hangzhou 310018 , PR China.
² Institute of Optoelectronic Technology , China Jiliang University , Hangzhou 310018 , PR China.

PMID: 31916432
DOI: 10.1021/acsami.9b19338

Abstract

The N-deficient porous g-C₃N₄ with broadband white light emission was constructed by supramolecular copolymerization design, which combined organic copolymers cyanuric acid and 2,4,6-triaminopyrimidine with melamine upon the mixture gas environment of (95%)N₂/(5%)H₂. Herein, we achieved great breakthrough in narrowing the band gap of g-C₃N₄ from 2.64 to 1.39 eV. Furthermore, in contrast to pristine g-C₃N₄, we demonstrated that the emission wavelengths of N-deficient porous g-C₃N₄ can be tuned from narrow blue to broadband white range, where the optimal white light coordinate position is (0.297, 0.345). The prepared N-deficient porous g-C₃N₄ overcomes the limitation of the narrow adjusting range of optical properties while using conventional g-C₃N₄ and makes it more promising for applications in solid-state displays.

Keywords: N-deficient porous g-C3N4; broadband luminescence; narrow band gap; supramolecular copolymerization; white light.