Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Gate tunable photovoltaic effect in MoS2 vertical p-n homostructures
Year:2017
Research Areas
  • Solar cells,
  • Technology of devices for engineering,
  • Photovoltaic generation
Information
Abstract
p-n junctions based on vertically stacked single or few-layer transition metal dichalcogenides (TMDCs) have attracted substantial scientific interest. Due to the propensity of TMDCs to show exclusively one type of conductivity, n- or p-type, heterojunctions of different materials are typically fabricated to produce diode-like current rectification and photovoltaic response. Recently, artificial, stable and substitutional doping of MoS2 into n- and p-type materials has been demonstrated. MoS2 is an interesting material for use in optoelectronic applications due to its potential of low-cost production in large quantities, strong light-matter interactions and chemical stability. Here we report the characterization of the optoelectronic properties of vertical homojunctions made by stacking few-layer flakes of MoS2:Fe (n-type) and MoS2:Nb (p-type). The junctions exhibit a peak external quantum efficiency of 4.7% and a maximum open circuit voltage of 0.51 V; they are stable in air; and their rectification characteristics and photovoltaic response are in excellent agreement with the Shockley diode model. The gate-tunability of the maximum output power, the ideality factor and the shunt resistance indicate that the dark current is dominated by trap-assisted recombination and that the photocurrent collection depends strongly on the spatial extent of the space charge region. We demonstrate a response time faster than 80 ms and highlight the potential to integrate such devices into quasi-transparent and flexible optoelectronics.
International
Si
JCR
Si
Title
Journal of Materials Chemistry C
ISBN
2050-7526
Impact factor JCR
5,256
Impact info
Volume
5
10.1039/c6tc04699a
Journal number
4
From page
854
To page
861
Month
SIN MES
Ranking
Participants
  • Autor: S.A. Svatek
  • Autor: Elisa Antolin Fernandez (UPM)
  • Autor: D.Y. Lin
  • Autor: R. Frisenda
  • Autor: C. Reuter
  • Autor: A.J. Molina-Mendoza
  • Autor: M. Muñoz
  • Autor: N. Agrait
  • Autor: T.S. Ko
  • Autor: D.P. De Lara
  • Autor: A. Castellanos-Gomez
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Instituto de Energía Solar
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)