Patented Thermal Conduction Cooling (TCC)
Ideal for evaporation of sensitive organic materials in UHV and OLED applications
Temperature range 15-300°C
Fast and precise temperature control < ±0.02K with excellent temperature stability
Crucibles capacities 2 cm³, 10 cm³ and 35 cm³
Full UHV and MBE compatibility
ISO-K cells available for HV applications
The Organic Material Effusion Cell OME is specially designed for the evaporation or sublimation of high vapor pressure materials, notably sensitive organic substances, at operating temperatures up to 300°C.
Schematic of the TCC technique
as applied in the OME
The data underlying the TCC curves in the following two diagrams were measured on a 2 cm³ OME 40-2-25 cell.
Cooling rates of TCC cell OME and standard TRC
effusion cell versus operation temperature
TCC cell OME and a TRC cell during a rapid cooling down procedure are compared in the second diagram on the right. It shows the resulting temperature decrease of both cells starting at the same cell temperature of 150°C.
Temperature gradation of TCC cell OME and
standard TRC effusion cell after heater switch-off
The excellent low temperature properties of the TCC concept make the OME ideally suited for evaporation of temperature sensitive materials like organics, polymers and other high vapor pressure materials from room temperature up to 300°C. As an option, operation even below room temperature is possible by using a chilled cooling liquid.
In ordinary radiation heated (TRC) low temperature cells the evaporant may be locally overheated due to the direct view of the crucible onto the heater wires. In contrast, the crucible of the OME cell never reaches a temperature higher than the actual temperature of the surrounding heater body. Rapid heating up and cooling down rates avoid waste of expensive materials during idling times.
Temperature fluctuation during
long-term operation of an OME cell
The diagramm on the left-hand side shows the excellent long term temperature stability of the OME. It displays a test run at setpoint 100°C with a constant cooling water flow of 0.5 l/min.
OME temperature characteristic at varied setpoints
The fast heating up and cooling down times of OME cells are shown on the second testing chart.
|Heating system||patented TCC technique with encapsulated Ta wire heater|
|Thermocouple||NiCr/NiAl (type K)|
|Operating temperature||15°C-300°C (lowest temperature depending on cooling temperature)|
|Temperature stability||< ±0.02K (with standard PID controller)|
|Outgassing temperature||max. 350°C|
|Bakeout temperature||max. 250°C|
|Cooling||integrated water cooled heat sink; water flow > 0.5l/min required|
|Crucibles||2-35 cm³ (conical shape on request); crucible material: quartz (Q) (others on request)|
|Options||integrated rotary shutter (S); integrated tight sealing shutter (TS),
evacuation tube (E); aperture nozzle (N)
The standard crucible material commonly used for organic evaporants is quartz. For special requirements, e.g. evaporation of alkali metals, other crucible materials like PBN or Al2O3 are also available.
The best performance of the OME is achieved when the cell is mounted upright in a rather vertical angle, though face-down operation is also possible by using special insert crucibles. For information on crucibles see Crucibles.
The second number of the product code is the nominal crucible capacity [in cm³], the third number indicates the lip diameter of the crucible. Please specify crucible material, if not quartz.
|Schematic drawing of the Organic Material Effusion Cell OME
For general information on CF mounting flanges see Flange and Gasket dimensions.
|[cm³]||[mm]||Option||[mm] / [mm]||[W] / [A]||Product code||Product code|
|OME||40 -||2 -||25 -||S, TS -||E¹, N²-||Q -||LxxxD36||270 / 9||PS 30-10||Quartz 2-25|
|OME||40 -||10 -||35 -||S, TS -||E¹, N²-||Q -||LxxxD36||270 / 9||PS 30-10||Quartz 10-35|
|OME||63 -||35 -||37 -||S, TS -||E¹, N²-||Q -||LxxxD57||400 / 16||PS 40-19||Quartz 35-37|
|*||rotary or tight sealing shutter possible on same flange||¹||only available in combination with option TS|
|**||Quartz standard, other materials on request||²||specify nozzle diameter with order|
|***||specify UHV length L with order|
e.g. OME 40-10-35-TS-E-Q-L400D36
is an organic material effusion cell on DN40 CF-flange for a 10cm³ crucible (lip Ø 35mm), tight sealing shutter, evacuation tube, quartz crucible, in-vacuum length 400mm and diameter 36mm.
The following list provides suggestions for related products. For additional product suggestions or more detailed information, please contact us.
|Standard Effusion Cell
|Low Temperature Effusion Cell
|Quad Cluster Source
|Soft-acting Rotary Shutter Module
|Quartz Crystal Monitor