Tunable light emission by exciplex state formation between hybrid halide perovskite and core/shell quantum dots

implications in advanced LEDs and photovoltaics

Rafael S. Sanchez, Mauricio S olis de la Fuente, Isaac Suarez, Guillermo Muñoz-Matutano, Juan P. Martinez-Pastor, Ivan Mora-Sero

Research output: Contribution to journalArticle

37 Citations (Scopus)
194 Downloads (Pure)

Abstract

We report the first observation of exciplex state electroluminescence due to carrier injection between the hybrid lead halide perovskite (MAPbI3-xClx) and quantum dots (core/shell PbS/CdS). Single layers of perovskite (PS) and quantum dots (QDs) have been produced by solution processing methods, and their photoluminescent properties are compared to those of bilayer samples in both PS/QD and QD/PS configurations. Exciplex emission at lower energies than the band gap of both PS and QD has been detected. The exciplex emission wavelength of this mixed system can be simply tuned by controlling the QD size. Light-emitting diodes (LEDs) have been fabricated using those configurations, which provide light emission with considerably low turn-on potential. The "color" of the LED can also be tuned by controlling the applied bias. The presence of the exciplex state PS and QDs opens up a broad range of possibilities with important implications not only in tunable LEDs but also in the preparation of intermediate band gap photovoltaic devices with the potentiality of surpassing the Shockley-Queisser limit.

Original languageEnglish
Article numbere1501104
Pages (from-to)1-7
Number of pages7
JournalScience Advances
Volume2
Issue number1
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2016. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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  • Cite this

    Sanchez, R. S., de la Fuente, M. S. O., Suarez, I., Muñoz-Matutano, G., Martinez-Pastor, J. P., & Mora-Sero, I. (2016). Tunable light emission by exciplex state formation between hybrid halide perovskite and core/shell quantum dots: implications in advanced LEDs and photovoltaics. Science Advances, 2(1), 1-7. [e1501104]. https://doi.org/10.1126/sciadv.1501104