Solution-processable small molecule based all-organic ultraviolet photodetector

Highly aligned organic microwire crystal arrays for high-performance polarization-sensitive photodetectors and image sensors

“…Considering that the spatial distribution of the MWCs fabricated by this method was precisely controlled, the fabricated photodetector array had a low DDV of 3.58%, which enabled the clear imaging of patterned light sources with different polarization angles. Our work not only demonstrated a method for micro-patterning organic crystals with a uniform structure and homogeneous optoelectronic properties but also promoted the application of patterned organic micro/nano- MoS 2 -1 × 10 −3 @1 V 50% [48] CdSe NWs 13 × 20 -39.3% [49] InAs/GaSb -0.22-0.23@50 mV 15%-25% [50] MoS 2 4 × 4 -13.7% [51] TMD/PCBM a -0.06@0 mV 10% [52] WSe 3 × 9 0.04@1 V 0.5% [53] MoS 2 /p-Si 10 × 12 1.59@1 V 11.8% [54] Alq3 microwires 8 × 9 1234@1 V 3.58% This study…”

Improved performance of ZnO based inverted organic photodetectors with morphological and interfacial modification

“…Assuming that the loose particle noise is the main noise under reverse bias, the D * is calculated by the following equation, 38,65 where q is the electric quantity carried by unit charge.…”

“…This could be attributed to the reduction of the probability of carrier recombination and the improvement of the charge transport, which were due to the fewer defects and lower doping concentration in the device. 28,63,64 Specific detectivity Assuming that the loose particle noise is the main noise under reverse bias, the D* is calculated by the following equation, 38,65…”

“…It was indicated that the number of defects gradually diminished with the decrease of the acceptor contents in the active layer, resulting in the reduction of J D . 32 J D and EQE could also be regulated by adjusting the annealing temperature, the thickness, [33][34][35] the mass ratio of the active layer [36][37][38] and the applied bias. [39][40][41] In addition, for traditional inverted organic photodetectors, a variety of strategies have been exploited on ZnO to improve the performance of OPDs, such as mixing different weight concentrations of PEIE with ZnO 42 and deposition of Mg-doped ZnO on ZnO films.…”

Organic photodetectors: materials, device, and challenges

“…38 In 2021, Dhar et al synthesized a tetramethoxyfluorene derivative (TMD)-based small molecule (C 53 H 54 O 4 ) as a donor in BHJ and achieved high light sensitivity of 10 5 magnitudes at zero bias and high detectivity of 9.36 Â 10 11 Jones. 39 In recent years, improving the working spectral range of polymer materials has become a research hotspot; researchers have continued to explore ways to suppress dark current and adjust the optical band gap to get higherperformance polymer materials. 40,41 In 2020, Lv et al reported two conjugated polymers with ultranarrow band gaps (0.6 eV), PBTT and PBTB, for photoconductor-mode SWIR OPDs.…”