Charge-transfer pentacene/benzothiadiazole derivative cocrystal for UV-to-NIR Large Range Responsive Phototransistors

Tetrachromatic vision-inspired neuromorphic sensors with ultraweak ultraviolet detection

“…S 1 d and S 3 ), which is the best result among the organic UV-sensitive phototransistors (Fig. 1g , Table S1 ) 29 , 32 – 43 . Although the enhancement of P value under 1600 nW cm −2 illumination was observed, the devices with buffer layer showed a weak detection ability of ultraweak UV light compared with bare SiO 2 dielectric layer (Fig.…”

“…More importantly, the fabricated devices could even detect the UV light intensity as low as 31 nW cm −2 , which was the lowest detectable intensity in organic UV-sensitive phototransistors (Fig. 1f , Table S1 ) 29 , 32 – 43 . By calculating the P based on the ratio of photogenerated current to the dark current under a certain light intensity 44 , the maximum value of P could reach 1.2 × 10 4 under 370 nm wavelength illumination at 1600 nW cm −2 light intensity (Fig.…”

Retina-inspired controllable neuromorphic vision organic sensors with ultraweak ultraviolet detection

“…As shown in Figure S2, the offstate current decreased from 10 -10 to 10 -12 A and the on-state current was accordingly increased with the aid of the modified layer. As a result, it was found that under the density of 1600 nW cm -2 , the value of P increased by at least one order of magnitude and the best value could reach to 8×10 5 (Figure S1d and S3), which is the best result among the organic UV-sensitive phototransistors (Figure 1g) 27,[30][31][32][33][34][35][36][37][38][39][40][41] . Although the enhancement of P value under 1600 nW cm -2 illumination was observed, the devices with buffer layer showed a weak detection ability of ultraweak UV-light compared that with bare SiO2 dielectric layer (Figure 2a and S4).…”

“…Positive photoresponse were observed with the obvious response discrimination at each illumination density. More importantly, the fabricated devices could even detect the UV-light intensity as low as 31 nW cm -2 , which was the lowest detectable intensity in UV-sensitive phototransistors (Figure 1f) 27,[30][31][32][33][34][35][36][37][38][39][40][41] . By calculating the photosensitivity (P) based on the ratio of photogenerated current to the dark current under a certain light intensity 42 , the maximum value of P could reach 1.2×10 4 under 370 nm wavelength illumination at 1600 nW cm -2 light intensity (Figure S1a).…”

Tunable multiple light emissions of core–shell structures based on rare earth ions doped on the surfaces of organic cocrystals

“…2 In the cocrystals, the highest occupied molecular orbital (HOMO) of D molecules and the lowest unoccupied molecular orbital (LUMO) of A molecules generate delocalization, which allows electron transition from D to A. 3 The electron transport is formed in a whole network of cocrystals, which makes them possess excellent electrical properties and be applied for photodetection, 4 phototransistors, 5 and organic field effect transistors. 6 A tunable organic semiconductor bandgap endows the cocrystals with novel and various optical properties, for instance, tunable light emission, 7 optical waveguides, 8 room temperature phosphorescence, 9 stimuli-responsive behaviors, 10 etc.…”