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Article Dans Une Revue Advanced Electronic Materials Année : 2022

Magnetic and Electric Field Dependent Charge Transfer in Perovskite/Graphene Field Effect Transistors

Nathan Cottam
  • Fonction : Auteur
Jonathan Austin
  • Fonction : Auteur
Chengxi Zhang
  • Fonction : Auteur
Amalia Patanè
  • Fonction : Auteur
Camilla Coletti
  • Fonction : Auteur
Vaidotas Mišeikis
  • Fonction : Auteur
Lyudmila Turyanska
Oleg Makarovsky
  • Fonction : Auteur

Résumé

Stable all-inorganic CsPbX3 perovskite nanocrystals (PNCs) with high optical yield can be used in combination with graphene as photon sensors with high responsivity (up to 106 A W−1) in the VIS-UV range. The performance of these perovskite/graphene field effect transistors (FET) is mediated by charge transfer processes at the perovskite – graphene interface. Here, the effects of high electric (up to 3000 kV cm−1) and magnetic (up to 60 T) fields applied perpendicular to the graphene plane on the charge transfer are reported. The authors demonstrate electric- and magnetic-field dependent charge transfer and a slow (>100 s) charge dynamics. Magneto-transport experiments in constant (≈0.005 T s−1) and pulsed (≈1000 T s−1) magnetic fields reveal pronounced hysteresis effects in the transfer characteristics of the FET. A magnetic time is used to explain and model differences in device behavior under fast (pulsed) and slowly (continuous) changing magnetic fields. The understanding of the dynamics of the charge transfer in perovskite/graphene heterostructures developed here is relevant for exploitation of these hybrid systems in electronics and optoelectronics, including ultrasensitive photon detectors and FETs for metrology.

Dates et versions

hal-03894476 , version 1 (12-12-2022)

Identifiants

Citer

Nathan Cottam, Jonathan Austin, Chengxi Zhang, Amalia Patanè, Walter Escoffier, et al.. Magnetic and Electric Field Dependent Charge Transfer in Perovskite/Graphene Field Effect Transistors. Advanced Electronic Materials, 2022, pp.2200995. ⟨10.1002/aelm.202200995⟩. ⟨hal-03894476⟩
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