BIP-KV100 Ionization Energy Measurement System

BIP-KV100

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BIP-KV100　Ionization Energy Measurement System

It is very critical and important to measure ionization energy and work function of the organic semiconducontor meterials such as organic electronic luminescense and organic thin flim solar cells.

Generally,measurement of ionization energy/work function has been done by photoelectron spectroscopy such as UPS and XPS in which the samples have been measured only under high vacuum atmoshere. However, organic devices are affected by the atmosphere so that measurement under various atmaospheric gas have been demanded.

By employing Photoelectron Yield Spectroscopy(PYS),Model BIP-KV100 is capable to measure such samples under nitrogen atmosphere,vacuum atmosphere, and atmosphere. Using a nitrogen purge type monochromator and optical system. Model BIP-KV100 is capable to irradiate vacuum ultra violet light up to 9.54eV to the samples.

Catalog（PDF）

Features

Background measurement and sample measurement can be continuously performed by the sample slide mechanism. Measurement is possble with the preset atmosphere(atmosphere, nitrogen, vacuum) maintained

Ultrahigh sensitivity of 13 digits (10fA～100mA）has been achieved with use of PYS method

A port mounting a commercially available dry vacuum pump and composite molecular pump is provided

The optionak Measurement Range Extension Unit enables the system to mearure from 3.4eV

Measurement Data

Measurement Items

①Background measurement
The light to be irradiated on the sample is mesured in advance with a photomultiplier, and the number of photons is calculated.

②Sample measurement
　Monochromatic light at each wavelength is irradiated to the sample while the voltage is applied to the sample for the electrons to be released easily.

③Ionization energy data processing
　Y ∝ (hν-I)n
     Y = Released numbers of electron measured / numbers of photon irradiated
　 h Plnck's constant
     ν Frequency
     I  Threshold
     n depends on density of elecrtrons in the high level edge in the occupied state of the sample.Only 2 or 3 can be selected in the parameter n.

Specifications

Measurement principle	Photoelectron Yield Spectroscopy (PYS method)
Measurement WL range	9.54～4.0eV（130～310nm）
Min.measurement interval	0.01eV
Measurement resolution	10fA～100mA
Sample chamber	Atmosphere, nitrogen, Vacuum compatible /VG65,NW25 port for vacuum pump
Irrdiation light area	approx. 1×3mm（by slit and vertical aperture）
WL reslution (WL width)	0.08eV（4.2nm）　*at256nm
Sample arranbement	Horizonal, Number of setting sample : 1pc
Sample size	Max.60×60mm, Min. 10×10mm, Thickness : within 4mm
Door switch	For safety of internal applied voltage electrode and for applied voltage for PMT
Monochromator structure	Nitrogen purge ( light source and high order light cut-filters built in )
WL drive	Stepping motor, sine bar method (GPIB control)
Focal length	100mm *for monochromator
Aperture ratio	F=3.5 *for monochromator
Mechancial WL range	0～400nm　*In case of the grating 2400 lines/mm
WL accuracy	±1nm　Setting from long WL WL accuracy & repeatabilty
Tubing introduction	IN2（Swagelok1/4 ）・OUT2（Swagelok3/8）・Relief valve, Flow meter,Stop valve
PY measuring device	Micro ammeter (Sub-Femtoamp Remote SourceMeter) *PY=Photoelectron Yield
Irrdiation intensity detector	PMT(supplied with certifled spectral sensitvity data for 130～310nm)
Software control function	System control,photoelectron measuring function,cal. of ionization eneygy(work function),DOS
Software save function	Data binary save and redisplay function,save in text

Standard Configurations

●Deuterium lamp 30W,(MgF2 Window,natural air cooling)
●Power supply for D2 lamp
●Nitrogen purge type monochromator
●Grating 2400 grooves/mm blazed at 150nm（MgF₂coating type）
●High order light cut filters and shutter
●Flow meter（1～10L/min）
●Sample chamber (atmosphere, nitrogen atmoshere,and vacuum compatible)
●Sample stage:62×62ｍｍ(PTFE,detachable)
●Sample stage slide mechanism (operated outside of sample chamver,travel distance 65mm)
●Plate electrode up-down mechanisum(travel distance 6ｍｍ)
●Standard sample（Gold leaf Au)
●PMT for measuring irrdiation light intensity and high voltage power supply （applied voltage -300V)
●Minute current measurement device for photoelectron yield measurement
　・Minimun range：1pA　Minimun range resolution：10aA（When the range is set at 1pA）
　・Max.range：100mA　Max.range resolution：1.0μA（When the range is set at 100ｍA）
　・Noise level : Within 0.4fAp-ｐ（4×10^-16Ａ noise）
●Controller (GPIB control）
●GPIB-USB cable
●Softwave
●PC for controling the system Note PC

Option

●Measurement range expansion unit（for 3.4～7.5eV）
　・Grating 2400grooves /mm blazed at 240nm（MgF₂ coating type）
　・PMT （for 3.4～7.5eV用）
●Automatic sequencer （Vacuum drawing,vacuum leak, nitrogen purge）
●Vacuum pump （Multi steps root motor type dry vacuum pump/Turbo Molecular Pump）

Utility

●Nitrogen：Regarding purity 99.999% or more is recommended
　　　　      Introdutction pressure：0.1～0.4MPa
　　　　     Ordinary use flow rate：Approx 3～5NL/min
　　　　      Nitrogen IN fitting：Swegelok1/4 2places
　　　　      Nitrogen OUT fitting：Swegelok3/8   2places
●Main unit：Approx.W660×Ｄ460×H500mm＊excluding the protrusion part
　　　　       Approx. W710×D550×Ｈ600mm＊excluding the protrusion part
●Welight ：Approx.80kg