Tuesday, May 05, 2020

Tower and Technion Integrate Organic PD into CMOS Process

Tower and Technion, Israel Institute of Technology, publish a Nature paper "Hybrid image sensor of small molecule organic photodiode on CMOS – Integration and characterization" by Himanshu Shekhar, Amos Fenigstein, Tomer Leitner, Becky Lavi, Dmitry Veinger, and Nir Tessler.

"Here, we demonstrate seamless integration of a thermally deposited visible light sensitive small molecule OPD on a standard commercial CMOS substrate using optimized doped PCBM buffer layer. Under a standard power supply voltage of 3 V, this hybrid device shows an excellent photolinearity in the entire bias regime, a high pixel sensitivity of 2 V/Lux.sec, a dynamic range (DR) of 71 dB, and a low dark leakage current density of 1 nA/cm2. Moreover, the integrated OPD has a minimum bandwidth of 400 kHz. The photoresponse nonuniformity being only 1.7%, achieved under research lab conditions, strengthens the notion that this fully-CMOS compatible technology has the potential to be applied in high-performance large-scale imaging array."


  1. If the title of a Nature paper says "image sensor", should we not expect imaging results? #justwondering

    1. Hi,
      In addition to integration of organic PD on CMOS, we have done extensive pixel (on CMOS ROIC) specific characterisations and focused on this part as pixels are the core of any image sensor. You can see detail characterisation in the paper.
      We did not try to capture any image as the pixel matrix (number of pixels) was not suitable for that. It is given that if pixels are of good quality then imaging will need just lens and data processing.
      I hope you will find it useful.


All comments are moderated to avoid spam and personal attacks.