In this work, a modified solution technique for synthesizing Ga ₂ O ₃ films is presented, which aims at fabricate high performance deep-ultraviolet (DUV) photovoltaic photodetectors (PDs). Through a selection of low boiling point organic solvent and high temperature heat treatment at 800 °C, the growth process of the films is optimized, with the single-crystal-oriented Ga ₂ O ₃ films synthesized on GaN substrate. A Pt/Ga ₂ O ₃ /GaN photodetector based on the film is fabricated, which exhibits a high photoresponsivity of 11.05 mA/W and a short decay time less than 48 ms under DUV irradiation and 0 V bias. Furthermore, tests on multiple devices fabricated by the same method at 0 V bias show a smallest ratio of 9.29% referring to the standard deviation of photocurrent to the average of the photocurrent (the ratio is defined as the coefficient of variation). It indicates that the improved solution technology for synthesizing Ga ₂ O ₃ films for the DUV photovoltaic PDs is reliable and reproducible. This research can serve as a reference for fabricating DUV photovoltaic PDs with high-performance based on solution-processed Ga ₂ O ₃ films.

Nociceptors are kinds of sensory neurons that send warning information to the central nervous system in response to noxious stimuli. Thermal nociception happens as the thermal stimulus exceeds 45 °C as this temperature is perceived to be potentially harmful. Simulating this function is of great significance to developing bioinspired electronic skins and humanoid robots, which thus creates more demands for electronic devices that can simulate thermal nociception. Herein, an artificial thermal nociceptor (ATN) is fabricated by integrating a temperature sensor and a synaptic transistor, which can simulate the thermal pain threshold of the human body and operates in a very similar way as the transient receptor potential vanilloid 1 (TRPV1). For this ATN, the function of temperature sensing is realized by a graphite–polydimethylsiloxane (Gr–PDMS) composite temperature sensor, and the synaptic functions, as well as nociceptor features, are emulated through a synaptic transistor using xanthan gum polysaccharide electrolyte as gate dielectric, providing energy‐efficient building blocks for brain‐inspired computation systems. In a word, the ATN proposed can help to open a new avenue and provides more possibilities in the design of artificial sensory systems with the functions of temperature perception and thermal feedback.