Synthesis of fluorene-based polyelectrolytes tethering different counterions for single-component white light-emitting electrochemical cells

Sheng-Hsiung Yang; Chia-Sheng Tsai; Bo-Cun Liu; Hai-Ching Su

doi:10.1117/12.2022853

27 September 2013 Synthesis of fluorene-based polyelectrolytes tethering different counterions for single-component white light-emitting electrochemical cells

Sheng-Hsiung Yang, Chia-Sheng Tsai, Bo-Cun Liu, Hai-Ching Su

Author Affiliations +

Proceedings Volume 8829, Organic Light Emitting Materials and Devices XVII; 88291U (2013) https://doi.org/10.1117/12.2022853
Event: SPIE Organic Photonics + Electronics, 2013, San Diego, California, United States

Abstract

A series of polyfluorene (PF) electrolytes bearing Br−, BF₄ −, or PF₆ − counterions were synthesized and characterized. 2,1,3-benzoselenadiazole moieties were incorporated into polymer main chains to produce single-component white lightemitting polymers. The thermal stability of Br-containing ionic PF was decreased because of the Hofmann elimination occurred at higher temperature. By replacing Br− with BF₄ − or PF₆ − counterions, the thermal stability of polymers was significantly improved. The emission intensity around 550 nm was decreased for ionic polyelectrolytes. The optimized spin-coated light-emitting electrochemical cell (LEC) with the configuration of ITO/PEDOT/polymer/Ag showed a maximum luminescence efficiency of 1.56 lm/W at a low operation bias of 3 V. The single-component LEC device exhibited pure white light emission with CIE’1931 coordinates approaching (0.33, 0.33) and high color rendering index (CRI < 85), referring to its potential use in solid-state-lighting application.

Citation Download Citation

Sheng-Hsiung Yang, Chia-Sheng Tsai, Bo-Cun Liu, and Hai-Ching Su "Synthesis of fluorene-based polyelectrolytes tethering different counterions for single-component white light-emitting electrochemical cells", Proc. SPIE 8829, Organic Light Emitting Materials and Devices XVII, 88291U (27 September 2013); https://doi.org/10.1117/12.2022853

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