Self-powered broadband photodetectors exhibit excellent self-powered and wide-band photoresponse from visible to infrared region and attract enormous attention due to their promising applications in imaging, sensing, and optical communication. PbSe colloidal quantum dots (CQDs) and halide perovskites nanocrystals (NCs) are commonly used for photodetectors due to their strong absorption capability, tunable bandgap, and high aspect ratio. However, due to suffering from low charge carrier mobility and high trap density, the performance of individual PbSe CQDs and perovskites-based photodetectors is not satisfactory. Integration of PbSe CQDs with inorganic mixed-halide perovskite nanomaterials can provide an opportunity to overcome these drawbacks. In this work, a hybrid nanocomposite of PbSe CQDs blended with all-inorganic mixed halide perovskite NCs is integrated to fabricate bulk-heterojunction-based high-performance photodetectors. The transportation of photogenerated carriers is enhanced by employing electrons-and holes-extracting layers. As a result, the photoresponsivity of 6.16 A W −1 and a specific detectivity of 5.96 × 10 13 Jones with an ON/OFF current ratio of 10 5 is obtained for bulk-heterojunction photodetector ITO/ZnO/PbSe:CsPbBr 1.5 I 1.5 /P3HT/Au in the self-powered mode. Meanwhile, the device performance of the fabricated photodetector is numerically simulated by using Technology Computer-Aided Design software, and the physical mechanisms for photogenerated carriers' transportation are discussed in detail.
Recently, lead-based halide perovskites have gained extensive attention for their outstanding optoelectronic properties. However, the toxicity of lead would seriously limit its future application. To address these issues, in this...
With the increasingly obvious trend of population aging in our country and the continuous changes in social intergenerational relations, the "medical and elderly care" elderly care service model has gradually shown its adaptability, it has solved the contradiction between traditional elderly care institutions and medical care, and is the main development direction of new elderly care services. At the same time, migratory bird-style elderly care is also booming. The rise of "migratory bird-style" elderly care has led to the rapid development of the local elderly care industry, real estate industry, and tourism. This article takes Panzhihua City, Sichuan Province, one of the first batches of "national pilot integrated medical and elderly care" cities in China, as an example, analyzes the development status and existing problems of "migratory bird-style" elderly care services in Panzhihua City under the background of integrated medical and elderly care, and is targeted in the context of the integration of medical and nursing care, the paper puts forward an optimization strategy for the "migratory bird-style" elderly care service in Panzhihua City.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.