Enhancing photoluminescence of 2D perovskite materials via the use of mixed phenylethylammonium halides

Name: Khine Zin Swe

Organization : Mahidol University. Faculty of Science

Name: Atittaya Naikaew

Organization : Mahidol University. Faculty of Science

Name: Paphada Kaewurai

Organization : Mahidol University. Faculty of Science

Name: Pongsakorn Kanjanaboos

Organization : Mahidol University. Faculty of Science, Ministry of Higher Education, Science, Research and Innovation. Center of Excellence for Innovation in Chemistry (PERCH-CIC)

Email : Pongsakorn.kan@mahidol.edu

ThaSH: Photoluminescence

ThaSH: Perovskite

ThaSH: Chemiluminescence

Abstract: In recent years, perovskite materials are developed for the optoelectronic applications such as solar cells, LEDs, and lasers. Perovskite materials are suitable for LED application due to its unique properties like direct band gap, high charge carrier mobility, high, photoluminescence quantum efficiency (PLQE), pure color emission, and low non-radiative recombination rate. Creating 2D perovskite materials by adding long aliphatic or aromatic chain such as butyl ammonium (BUA), benzyl ammonium (BA), and phenylethylammonium (PEA) can promote photoluminescence via enlarging exciton binding energy. Among those organic cations, the intercalation of PEA can improve the perovskite film by impeding crystal growths, causing smaller grains and better surface morphology. In this work, we investigated the effect of different large cations on perovskite thin films fabricated by spin coating method. 2D perovskite with only phenylethylammonium iodide (PEAI), having formula of PEA2PbI3, provided low PLQE of 0.5 percent. However, with phenylethylammonium bromide (PEABr) mixing, the PLQE was increased more than ten times. The thin films became smoother while retaining similar color profile. The use of mixed phenylethylammonium halides could significantly improve photoluminescence efficiency and morphology.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2020

Modified: 2024-10-28

Issued: 2024-10-28

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BibliograpyCitation : In the Chemical Society of Thailand under the Patronage of Professor Dr. HRH Princess Chulabhorn in association, Thammasat University Faculty of Science and Technology. The Pure and Applied Chemistry International Conference 2020 (PACCON 2020) (RE88-94). Bangkok : Thammasat University

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