Modulation of the carrier balance of lead-halide perovskite nanocrystals by polyelectrolyte hole transport layers for near-infrared light-emitting diodes

Chih-Chien Lee; Johan Iskandar; Ade Kurniawan; Hung-Pin Hsu; Ya-Fen Wu; Hsin-Ming Cheng; Shun-Wei Liu

doi:10.1016/j.heliyon.2022.e10504

Modulation of the carrier balance of lead-halide perovskite nanocrystals by polyelectrolyte hole transport layers for near-infrared light-emitting diodes

Heliyon. 2022 Sep 5;8(9):e10504. doi: 10.1016/j.heliyon.2022.e10504. eCollection 2022 Sep.

Authors

Chih-Chien Lee¹, Johan Iskandar^{1

2}, Ade Kurniawan^{1

2}, Hung-Pin Hsu^{3

2}, Ya-Fen Wu^{3

2}, Hsin-Ming Cheng^{3

2}, Shun-Wei Liu^{3

2}

Affiliations

¹ Department of Electronic Engineering National Taiwan University of Science and Technology, Taipei City 106335, Taiwan.
² Organic Electronics Research Center, Ming Chi University of Technology, New Taipei City 243303, Taiwan.
³ Department of Electronic Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan.

Abstract

An alternative material, methylamine (MA)-doped poly[3-(4-carboxymethyl)thiophene-2,5-diyl] (P3CT) as hole transport layer (HTL) was investigated for efficient solution-processed near-infrared perovskite light-emitting diodes (NIR PeLEDs). The best NIR PeLEDs performance was achieved with an optimized composition ratio of the MA-doped P3CT (1:1) due to the balance of the electron and hole carrier in the active layer. The charge-balanced NIR PeLEDs exhibit the highest radiance of 858.37 W sr^-1 m^-2, a low turn-on voltage of 1.82 V, and an external quantum efficiency of 7.44%. Our findings show that using P3CT as an alternative HTL has the potential to significantly improve PeLED performance, allowing it to play a role in the development of practical applications in high-power NIR LEDs.

Keywords: Charge balance; Hole transport layer; NIR PeLEDs; P3CT.