IIT-CNR OFET transistor characterisation sweeps

OFET transistor characterisation sweeps Sweeps of organic thin-film transistors, N- and P- types, from a series of batches fabricated in collaboration between Italian Institute of Technology, Center for Robotics and Intelligent Systems (Genova), Event-Driven Perception for Robotics group PI Chiara Bartolozzi, and Consiglio Nazionale di Ricerca, Institute for Microelectronics and Microsystems (Tor-Vergata Rome), Organic Devices group PI Luigi Mariucci. Researchers: Bamford, SimeonScagliotti, MattiaRapisarda, MatteoValletta, AntonioMariucci, LuigiBartolozzi, Chiara Transistor Sweep Dataset Format This repository contains raw transistor IDS–VGS–VDS sweep measurements.Each file corresponds to one sweep (either a VGS sweep or a VDS sweep) of a single transistor. The dataset is designed to be simple to parse programmatically while still encoding device metadata (geometry, polarity, sweep bias) in the filename. 1. File Naming Convention All measurement files are ASCII text files with extension .txt and names of the form: <YYYY>_<MM>_<DD>_<hh>_<mm>_<ss>_<deviceID>_[optional CNR tokens]_<sweep tokens>_<dimension token>.txt Components Element Description Timestamp First 6 underscore-separated fields: YYYY_MM_DD_hh_mm_ss Device ID DeviceName or CNR block form: `BL Sweep type A token containing IdVd → VDS sweep; otherwise → VGS sweep Fixed bias Vg… / Vgs… → fixed VGS; Vd… / Vds… → fixed VDS. Numerical value follows the prefix. Polarity _P_ → p-type; _N_ → n-type Device geometry Token of the form: L<length>W<width> (e.g. L50W200) Example: 2025_03_22_14_30_05_BL_3_2_IdVd_Vg-20_L50W200.txt This encodes: timestamp = 2025-03-22 14:30:05 device = block BL, row 3, col 2 sweep type = VDS sweep fixed Vg = −20 V geometry: L = 50 µm, W = 200 µm 2. File Contents Each file contains optional header lines and tab-separated numeric data. 2.1 Header lines Lines beginning with # or V are ignored except the VDS declaration in VGS sweeps: # Vds = <value> V If present, this provides the constant VDS.If not present, the constant VDS value must be taken from the filename. 2.2 Data lines All data lines are tab-separated floating-point numbers. VGS sweep (sweep type = g) <Vgs> <tab> <Ids> VDS is constant for the entire file. VDS sweep (sweep type = d) <Vds> <tab> <Ids> VGS is constant for the entire file. 3. Units Voltages: volts (V) Currents: amperes (A) Channel length/width: micrometres (µm) (conventionally; units not explicitly encoded) 4. Sign Conventions Polarity is inferred from the filename (_P_ or _N_). p-type devices may use negative IDS and/or negative VDS. Sign conventions are not encoded explicitly in the file and should be handled by the parser. ------------------------------------------------------------------------ 5. Suggested Parsed Representation A parser should extract for each file: { "datetime": "...", "device": "...", "sweep_type": "g" | "d", "fixed_vgs": <float or None>, "fixed_vds": <float or None>, "polarity": "p" | "n" | "?", "length": <µm>, "width": <µm>, "data": [ [vgs, vds, ids], ... ] } Where: - VGS *or* VDS is constant per sweep. - `data` may be stored as apandas DataFrame or a NumPy array. 6. Importing code For actual implementation of importer, please refer to: https://github.com/event-driven-robotics/ofet_import To visualise sweeps thus imported, consider: https://github.com/event-driven-robotics/ivplot