Electric-field effect on photoluminescence of lead-halide perovskites

Hee Taek Yi, Sylvie Rangan, Boxin Tang, Daniel Frisbie, Robert A. Bartynski, Yuri N. Gartstein, Vitaly Podzorov

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

With the development of novel semiconductors for optoelectronic applications, new device functionalities utilizing unique characteristics of emerging materials can be particularly appealing. Here, we demonstrate a reversible control of photoluminescence (PL) emission from lead-halide perovskites achieved in perovskite electric-double-layer transistors. PL in several prototypical lead-halide perovskite compounds is shown to be reversibly tuned by a small gate voltage in the range ±1.2 V applied to the ionic-liquid gel on the perovskite surface, with the intensity modulation that can reach one to two orders of magnitude. This effect may be mediated by a reversible migration of oxygen ions affecting the crystal region near the interface with the ion gel. The resulting passivation (or activation) of non-radiative recombination centers (traps) by oxygen ions would then modulate the population of mobile photogenerated electrons and holes that give rise to PL, which is thus tuned with an electric “knob” (the gate) in these devices.

Original languageEnglish (US)
Pages (from-to)31-39
Number of pages9
JournalMaterials Today
Volume28
DOIs
StatePublished - Sep 2019

Bibliographical note

Funding Information:
We thank Prakriti P. Joshi and Xiaoyang Zhu of the Department of Chemistry, Columbia University for providing some of the crystals used in this study. YNG is grateful for support through the Department of Energy, Office of Basic Energy Science (DOE/OBES) grant DE-SC0010697. CDF acknowledges partial support from the MRSEC program of the National Science Foundation under Grant Number DMR-1420013. VP acknowledges support from the CMP program of the National Science Foundation under Grant Number DMR-1506609. HTY and VP designed the experiments and performed electric and PL measurements. SR and RAB performed XPS measurements and analysis. BT and CDF fabricated the ion gel. YNG and VP devised the theoretical model of the effect of surface recombination on PL intensity and transition flux FT. HTY and VP wrote the manuscript. All authors discussed the results. The data that support the findings of this study are available from the corresponding author on request.

Funding Information:
We thank Prakriti P. Joshi and Xiaoyang Zhu of the Department of Chemistry, Columbia University for providing some of the crystals used in this study. YNG is grateful for support through the Department of Energy, Office of Basic Energy Science (DOE/OBES) grant DE-SC0010697 . CDF acknowledges partial support from the MRSEC program of the National Science Foundation under Grant Number DMR-1420013 . VP acknowledges support from the CMP program of the National Science Foundation under Grant Number DMR-1506609 .

Publisher Copyright:
© 2019 Elsevier Ltd

How much support was provided by MRSEC?

  • Partial

Reporting period for MRSEC

  • Period 6

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