Jaramillo Research GroupElectronic Materials

Core Emphasis• Chalcogenide materials• Semiconductors and dielectrics• Defect- and phase-control• Thin film growth & characterization

Application areas• Chemical sensing• Integrated photonics• Neuromorphic computing• Renewable energy - photovoltaics

Complex chalcogenides

Photoconductors

Phase-change materials

Complex sulfides and selenides in the perovskite, LiNbO3, and Ruddlesden-Popper structure types

Thermodynamic growth window for ZnSnS3-on-GaN

Installing the MBE At the CVD tube furnace

Visualizing BaZrS3 layer-by-layer growth

• Theory-guided materials discovery• Molecular beam epitaxy (MBE)

• Semiconductors for visible & IR applications

Making materials in the cleanroom

At the measurement probe station

• Defect-engineering• Chemical bath deposition (CBD)

• Chemical sensing• Neuromorphic computing

Illumination Trapping: conductive state

Insulating state

Charge state transitions

conduction band

defect level

valence band

Controlling responsivity of CdS photoconductors through materials processingGeneric scheme for photoconductive chemical sensing

Electron-beam evaporation in the MBE

Prof. Rafael Jaramillo

• Training in condensed matter physics & materials science

• Broadly interested in:• Semiconductor materials &

devices• Renewable energy technologies• Information technologies• Solid state physics• Experimental technique

development

• Theory-guided materials design• 2D materials research

• Active materials for integrated photonics

Calculated VIS-IR response of monolayer MoS2 in 2H and 1T’ phases