TY - JOUR
T1 - Tunable light emission by exciplex state formation between hybrid halide perovskite and core/shell quantum dots
T2 - implications in advanced LEDs and photovoltaics
AU - Sanchez, Rafael S.
AU - de la Fuente, Mauricio S olis
AU - Suarez, Isaac
AU - Muñoz-Matutano, Guillermo
AU - Martinez-Pastor, Juan P.
AU - Mora-Sero, Ivan
N1 - 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.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84979634831&partnerID=8YFLogxK
U2 - 10.1126/sciadv.1501104
DO - 10.1126/sciadv.1501104
M3 - Article
C2 - 26844299
AN - SCOPUS:84979634831
SN - 2375-2548
VL - 2
SP - 1
EP - 7
JO - Science Advances
JF - Science Advances
IS - 1
M1 - e1501104
ER -