Study of binary and ternary organic hybrid CdSe quantum dot photodetector

摘要: The hybrid binary and ternary photodetectors (PDs) were fabricated from P3HT–PC71BM with CdSe quantum dot (QD) materials. absorption spectra of P3HT:PC71BM (named as B1), P3HT:CdSe (B2) P3HT:CdSe:PC71BM (T) active blended material analyzed in the wavelength range 350 to 800 nm. current density–voltage characteristics device measured dark under illumination for study detector detectivities contact electrode. \({J_{{\text{under}}\,{\text{illumination}}}}/{J_{\text{dark}}}\) ratio at −0.5 V PDs B1, B2 T is 1.1 × 102, 1.9 102 1.8 103, respectively. values detectivity \(({D^*})\) are 1 1010, 2 1010 7 1011 Jones, \({D^*}\) PD ten times comparison B1 PDs. linear dynamic (LDR) value more than double both by QD increases photon efficiency detector, same time detectors have high broad spectral range. responsivity light intensity exponent θ ~0.55, 0.55 0.62, respectively, which represents a complex process electron hole generation, recombination trapping within material.