cryo: Added texts

docs/source/content/hardware.rst

@@ -47,10 +47,14 @@ The sEQE setup's sample holder is custom design by Grey and the 3D printed parts
 
 Cryostate
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+Organic solar cell characterization was initially conducted at room temperature utilizing the setup as described above. However, to gain deeper insights into temperature-dependent mechanisms affecting light conversion within the solar cells, we enhanced our experimental setup by integrating a cryostat for temperature-dependent sEQE measurements.
+The process involves loading the samples onto the temperature stage under standard conditions, establishing electrical connections via thin metal pins, and connecting the cryostat to the temperature controller, liquid nitrogen pump, and a liquid nitrogen-filled dewar. Prior to measurement,
+the temperature stage is flushed with nitrogen for 5-10 minutes to remove water and oxygen within the cryostat. Subsequently, the cryostat is affixed onto a custom-built holder and aligned within the EQE setup. To prevent condensation during measurement, a thin plastic tube delivering warm nitrogen air is directed onto the quartz window.
+Temperature settings and measurements are facilitated by our custom-built Python software and a propetary Windows program provided by the cryostat supplier. The cryostat’s temperature range spans from -196°C to +420°C, with most measurements on our organic solar cells conducted between -125°C and +80°C.
 
 .. image:: ../_static/Photo-EQE-Setup-Labelled-With-Cryostat.png
   :width: 700
   :alt:  Photograph of the sEQE setup with cryostate from above.
 
-Photo of the custom-built sensitive EQE setup used in this work. The individual components are numbered as (1a) tungsten-halogen light source, (1b) light source power supply, (2) monochromator, (3a) monochromator filter wheel, (3b) long-pass filter wheel, (4a) chopper wheel, (4b) chopper wheel power supply, (5) focusing lenses, (6) rail, (7a) croystat chamber - sample holder, (7b) liquid nitrogen dewar, (7c) liquid nitrogen pump, (7d) cryostate control, (8) sample holder stage, (9) BNC cables, (10) preamplifier, (11) Lock-In amplifier, (12) measurement computer and (13) black encasing.
+Photo of the custom-built sensitive EQE setup used in this work. The individual components are numbered as (1a) tungsten-halogen light source, (1b) light source power supply, (2) monochromator, (3a) monochromator filter wheel, (3b) long-pass filter wheel, (4a) chopper wheel, (4b) chopper wheel power supply, (5) focusing lenses, (6) rail, (7a) croystat chamber - sample holder, (7b) liquid nitrogen dewar, (7c) liquid nitrogen pump, (7d) cryostat temperature control, (8) sample holder stage, (9) BNC cables, (10) preamplifier, (11) Lock-In amplifier, (12) measurement computer and (13) black encasing.