Dynamic FPAA-based Mixed-Signal Processing Circuit for Thin-Film CdTe/Lead-Free Perovskite Photodetectors

Elektronika ir Elektrotechnika

Ivailo M. Pandiev¹  Mariya P. Aleksandrova² 

[1] Department of Electronic Engineering, Technical University of Sofia, Bulgaria;Department of Microelectronics, Technical University of Sofia, Bulgaria;

关键词: amplifiers;    cdte;    fpaa;    lead-free perovskites;    photodetectors;    pulse width modulation converters;    thin films;   

DOI  :  10.5755/j02.eie.28751

来源: DOAJ

【 摘 要 】

New photodetector structure combining thinned CdTe film with lead-free perovskite photoelectric film was produced and investigated. This setting of the CdTe thickness results in photodetector parameters’ competitiveness to the state-of-the-art in the field of advanced photoelectric materials. The device shows a promising sensitivity of ~40 μA/W, maximum responsivity of 10.6 mA/W at 460 nm, equal rise and fall times of 30 ms, and high linearity (maximum linearization error is less than 0.6 %). However, the optoelectronic performance of CdTe/lead-free perovskite structures integrated with signal processing circuit remains unexplored. For this purpose, Field Programmable Analogue Array (FPAA)-based mixed-signal processing circuit is developed for pulse width modulated electrical signal with duty cycle controlled by the illumination degree of the detecting photoelement. This novel approach guarantees a smooth change of the electrical output at a smooth change of the input illumination between the light and dark switching states and can be practically applied as a precise position detector of moving objects. The paper represents a synergistic connection between microelectronics, electronics, and signal technology.

【 授权许可】

Unknown