ELM Facility Cluster

Energy Level Measurements (ELM) is a cluster of facilities dedicated to the evaluation of band energy parameters such as Fermi level, valence/conduction band edges, bandgap and density of states. We have dedicated researchers who carry out measurements on a range of materials and we are happy to collaborate and perform measurements for researchers.

You can find some of related publications further below.

ELM Research Officer

Dr Dilli Babu Padmanaban

Profile & Contact details

ELM Facilities

X-ray & Ultraviolet Photoelectron Spectrometer (XPS & UPS) – ESCALAB XI+-Thermo Fisher Scientific

The UUPS is an X-ray photoelectron spectroscopy (XPS) facility with a number of features that include ultraviolet photoelectron spectroscopy (UPS), relfective electron energy loss spectroscopy (REELS), ion scatterning spectroscopy (ISS) etc. The facility is also equipped with an additional processing chamber, the PAD, customised for atmospheric pressure plasma research. The main analysis unit provides full spatially resolved (< 15 μm) XPS chemical analysis via a monochromatic Al Kα source with variable spot size (~100-20 μm) and electron analyser with matching kinetic energy range covered by the photon source. XPS depth profiling is obtained via an angle-resolved capability (non-destructive, 1-10 nm) or via a noble gas ion cluster source (destructive, >10 nm). High resolution analysis of the electronic band structure of bulk and nanomaterials is facilitated by XPS, UPS and REELS analysis. UPS uses a discharge lamp optimized for He (I)/He(II) with a resolution of ~0.5 eV or better.

Air photoemission system with scanning Kelvin probe – APS04-KP Technology

The APS04 systems measure the absolute work function of a material by Photoemission in Air, no vacuum required. With an excitation range of 3.3eV to over 7eV, the APS04 systems are capable of measuring the absolute Work Function of Metals and the full bands of Semicondcutors can be measured in one system, no other product can do this

Ultra-violet/visible transmission/reflectance/absorption spectroscopy with integrating sphere – PerkinElmer Lambda 950

The Lambda 950 soectrometer is a versatile instrument peration in the ultraviolet and visible spectral ranges. The spectrometer features a double-beam, double-monochromator, ratio-recording otpical system

Photoluminescence (PL) measurement system – Agilent Cary Eclipse

Computer-controlled ratioing fluorescence spectrophotometer with measurement modes for fluorescence, phosphorescence, chemiluminescence and bioluminescence. Czerny-Turner 0.125 m monochromators, 190–1100 nm wavelength range, fixed selectable SBW from 1.5 to 20 nm, full spectrum Xe pulse lamp single source with exceptionally long life, horizontal beam geometry, dual R928 PM tubes

Mott-Schottky measurement system with Dielectric Analyser – Novocontrol Technologies

Computer-controlled ratioing fluorescence spectrophotometer with measurement modes for fluorescence, phosphorescence, chemiluminescence and bioluminescence. Czerny-Turner 0.125 m monochromators, 190–1100 nm wavelength range, fixed selectable SBW from 1.5 to 20 nm, full spectrum Xe pulse lamp single source with exceptionally long life, horizontal beam geometry, dual R928 PM tubes

ELM Relevant Papers

Bridging energy bands to the crystalline and amorphous states of Si QDs
One-step synthesis of strongly confined, defect-free and hydroxy-terminated ZnO quantum dots
Microplasma-synthesized ultra-small NiO nanocrystals, a ubiquitous hole transport material
Controlling the Energy-Level Alignment of Silicon Carbide Nanocrystals by Combining Surface Chemistry with …
Surface functionalization of grown-on-tip ZnO nanopyramids: from fabrication to light-triggered applications
Size-dependent stability of ultra-small α-/β-phase tin nanocrystals synthesized by microplasma
Multi-functional MnO2 nanomaterials for photoactivated applications by a plasma-assisted fabrication route
Type-I alignment in MAPbI3 based solar devices with doped-silicon Nanocrystals
Ultra-small CuO nanoparticles with tailored energy-band diagram synthesized by a hybrid plasma-liquid process
Understanding surface chemistry during MAPbI3 spray deposition and its effect on photovoltaic performance
Energy band diagram of device-grade silicon nanocrystals