Ultrahigh photosensitive organic phototransistors by photoelectric dual control

Abstract

We report a novel OPT working mode by photoelectric dual control. After each light switch, the dark current is erased by the gate voltage in depletion mode which remains unchanged during light off; the photocurrent increases by the device converting to accumulation mode when the light is on.

An A-π-D-π-A-Type Organic Semiconductor Based Optoelectrical Device With Photo Response and Optical Memory Behaviors

“…Noticeably, when the p-type device is irradiated with white light (4,200 μW cm −2 ) for 10 sec, the saturated I d is significantly enhanced to 1.14 μA, with an increased hole mobility of 8.4 × 10 -4 cm 2 V −1 sec −1 and a maximum P value (I photo /I dark ) of 62 at V g − 20 V. Following the reported formulas (Han et al, 2019), the values of photoresponsivity (R) and detectivity (D*) are almost positively correlated with gate voltage (Supplementary Figure S3), with maximum values of around 0.07 A W −1 and 2.5 × 10 10 Jones, respectively, obtained at V g − 100 V. Subsequently, the influence of light intensity on IDTOD-4F based p-type optoelectrical devices is systematically investigated. The white light pulse width is 10 sec.…”

Recent Progress in Organic Photodetectors and their Applications

“…Similarly, Han et al proposed an ultrahigh photosensitive PT-OPDs with a broad spectral response (from 410 to 740 nm) and parallel structure of Si/SiO 2 /Octadecyltrichlorosilane (OTS)/FBT-Th4(1,4):PC 61 BM/Au electrodes. [20] With the trapping of electrons, the enhanced photocurrent and photoconductive gain were obtained, yielding an outstanding performance of a photoresponsivity of 1.2 × 10 5 A W −1 and spectral detectivity of 3.18 × 10 16 Jones at zero bias with 0.55 µW cm −2 at 700 nm.…”

Crystal structure of 2-butyl-6-(ethylamino)-1H-benzo[de]isoquinoline-1,3(2H)-dione, C18H20N2O2

“…Recently, organic conjugated molecular materials have become a research hotspot in the field of photoelectric molecular materials because of their wide application in photoluminescence [3][4][5], photoelectric devices [6,7], field effect transistors [8,9] and functional complexes [10]. 1,8-Naphthalimide derivatives are important organic conjugated molecules which can be used as fluorophores in the design of fluorescent probe [11] and prodrug [12].…”