https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30691 2 nanoplate photoelectrode is prepared by using a mild wet-chemical method. Depending on the calcination temperatures, SnS₂-based photoelectrodes can either retain their n-type nature with greatly enhanced anodic photocurrent density (ca. 1.2 mA cm⁻² at 0.8 V vs. Ag/AgCl) or be completely converted into p-type SnS to generate approximately 0.26 mA cm⁻² cathodic photocurrent density at −0.8 V vs. Ag/AgCl. The dominance of sulfur and tin vacancies are found to account for the dramatically different photoelectrochemical behaviors of n-type SnS₂ and p-type SnS photoelectrodes. In addition, the band structures of n-type SnS₂ and p-type SnS photoelectrodes are also deduced, which may provide an effective strategy for developing SnS₂/SnS films with controllable energy-band levels through a simple calcination treatment.]]> Sat 24 Mar 2018 07:35:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30209 Sat 24 Mar 2018 07:31:04 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26904 Sat 24 Mar 2018 07:23:35 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39958 L-F) has been designed and synthesized starting from a low-cost pyrene core functionalized with triphenilamine substituents at 1,3,6,8 positions (L-H), obtained via Suzuki coupling reactions. Its performance when used as green emitter in organic light emitting diodes (OLEDs) or as dopant-free hole-transporting material (HTM) in halide perovskite solar cells (PSCs) is higher than that of the L-H counterpart, in spite of its lower bulk hole-mobility (7.0 x 10⁻⁶ cm²/V) to L-H (1.9 x 10⁻⁴ cm²/V). In fact, the OLED devices based on a L-F active layer showed excellent green emission (brightness and current efficiency were 1759.8 cd/m² and 3.7 cd/A, respectively) at a 4.5 V turn-on voltage. When the molecules were employed as a dopant-free HTM in PSCs, L-F led to a power conversion efficiency (PCE) and open circuit voltage (V_oc) of 5.9% and 1.07 V, respectively, thus outperforming those of corresponding devices based on L-H (PCE = 5.0% and V_oc = 0.87 V) under similar experimental conditions (AM 1.5G and 100 mW cm²). We attribute the enhancements of L-F-based optoelectronic devices (OLEDs and PSCs) to the observed better quality of the L-F films. The promising performance of L-F indicates that fluorination of small molecules can be an effective strategy to achieve low-cost and high-performing materials for energy harvesting and display-based organic electronic devices.]]> Mon 29 Jan 2024 17:53:33 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40925 Mon 25 Jul 2022 15:11:17 AEST ]]>