TY - JOUR
T1 - Nanotexturing to Enhance Photoluminescent Response of Atomically Thin Indium Selenide with Highly Tunable Band Gap
AU - Brotons-Gisbert, Mauro
AU - Andres-Penares, Daniel
AU - Suh, Joonki
AU - Hidalgo, Francisco
AU - Abargues, Rafael
AU - Rodríguez-Cantó, Pedro J.
AU - Segura, Alfredo
AU - Cros, Ana
AU - Tobias, Gerard
AU - Canadell, Enric
AU - Ordejón, Pablo
AU - Wu, Junqiao
AU - Martínez-Pastor, Juan P.
AU - Sánchez-Royo, Juan F.
N1 - Funding Information:
This work was supported by the Spanish Government (Grant Nos. TEC2014-53727-C2-1-R and MAT2014-53500-R as well as Grants FIS2015-64886-C5-3-P and FIS2015-64886-C5-4-P), the Comunidad Valenciana Government (Grant No. PROMETEOII/2014/059), and the Generalitat de Catalunya Government (2014SGR301). The work at Berkeley was supported by National Science Foundation No. DMR-1306601. Authors thank the Central Support Service for Experimental Research (SCSIE) (SEM and Micro-PL facilities) of the University of Valencia. J.F.S.R. acknowledges financial support from the Mobility Program of VLC-CAMPUS. E.C., G.T., F.H., and P.O. acknowledge support of the Spanish MINECO through the Severo Ochoa Centers of Excellence Program under Grants SEV-2015-0496 and SEV-2013-0295. F.H. acknowledges support of CONACYT. M.B.G. acknowledges his fellowship no. UVINV-PREDOC13-110538 under the program Atraccio de Talent, VLC-CAMPUS of the University of Valencia. D.A.P. acknowledges his contract CPI-15-276 under the program PROMETEOII/2014/059.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/5/11
Y1 - 2016/5/11
N2 - Manipulating properties of matter at the nanoscale is the essence of nanotechnology, which has enabled the realization of quantum dots, nanotubes, metamaterials, and two-dimensional materials with tailored electronic and optical properties. Two-dimensional semiconductors have revealed promising perspectives in nanotechnology. However, the tunability of their physical properties is challenging for semiconductors studied until now. Here we show the ability of morphological manipulation strategies, such as nanotexturing or, at the limit, important surface roughness, to enhance light absorption and the luminescent response of atomically thin indium selenide nanosheets. Besides, quantum-size confinement effects make this two-dimensional semiconductor to exhibit one of the largest band gap tunability ranges observed in a two-dimensional semiconductor: from infrared, in bulk material, to visible wavelengths, at the single layer. These results are relevant for the design of new optoelectronic devices, including heterostructures of two-dimensional materials with optimized band gap functionalities and in-plane heterojunctions with minimal junction defect density.
AB - Manipulating properties of matter at the nanoscale is the essence of nanotechnology, which has enabled the realization of quantum dots, nanotubes, metamaterials, and two-dimensional materials with tailored electronic and optical properties. Two-dimensional semiconductors have revealed promising perspectives in nanotechnology. However, the tunability of their physical properties is challenging for semiconductors studied until now. Here we show the ability of morphological manipulation strategies, such as nanotexturing or, at the limit, important surface roughness, to enhance light absorption and the luminescent response of atomically thin indium selenide nanosheets. Besides, quantum-size confinement effects make this two-dimensional semiconductor to exhibit one of the largest band gap tunability ranges observed in a two-dimensional semiconductor: from infrared, in bulk material, to visible wavelengths, at the single layer. These results are relevant for the design of new optoelectronic devices, including heterostructures of two-dimensional materials with optimized band gap functionalities and in-plane heterojunctions with minimal junction defect density.
KW - band gap engineering
KW - indium selenide
KW - microphotoluminescence
KW - nanotexturing
KW - optical properties
KW - Two-dimensional materials
UR - http://www.scopus.com/inward/record.url?scp=84974806619&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.6b00689
DO - 10.1021/acs.nanolett.6b00689
M3 - Article
AN - SCOPUS:84974806619
SN - 1530-6984
VL - 16
SP - 3221
EP - 3229
JO - Nano Letters
JF - Nano Letters
IS - 5
ER -