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Defects in perovskite films not only challenge the efficiency and stability improvement of perovskite solar cells (PSCs), but also serve as electronic dopants that impact interface energetics and charge-transfer kinetics. To address this issue, herein, we introduced a natural additive into a perovskite precursor to improve the inorganic CsPbI2Br film quality. Arising from the strong interaction between passivation molecules and undercoordinated Pb2+ in the perovskite, the reduction in defects results in effective n-type de-doping of the inorganic CsPbI2Br perovskite surface, concomitantly forming an n/n− homojunction at the top perovskite/carbon interface for accelerating charge extraction and suppressing carrier nonradiative recombination in a carbon-based PSC. Consequently, a cutting-edge efficiency as high as 15.0% was achieved with reduced hysteresis in addition to significantly improved long-term stability for a 65 days storage period in the air (94.74% efficiency retention rate) and persistent light irradiation for over 230 hours in N2 (∼82% efficiency retention rate). [ABSTRACT FROM AUTHOR]

As nonspecific adsorption or biofouling has obvious side effects on the selectivity, it is a great challenge for cytosensors to detect target cells in practical biological samples. In this study, we first propose the design and synthesis of an antifouling photoelectrode. The antifouling photoelectrode not only has the desired photocurrent response, but also possesses an unexpected antifouling capability of resisting nonspecific adsorption of biomolecules. Herein, the PEDOT-HPG/SnS/ZnO-NT antifouling photoelectrode was formed and a robust photoelectrochemical cytosensor with enhanced sensitivity and selectivity has been demonstrated. [ABSTRACT FROM AUTHOR]

An efficient signaling on–off mechanism was first proposed by integrating exciton–plasmon coupling and exciton energy transfer into cathodic PEC bioassays. This signaling on–off mechanism has endowed the cathodic PEC biosensor with powerful capability for ultrasensitive and specific detection of target DNA. [ABSTRACT FROM AUTHOR]

The present study reports an aqueous synthesis approach towards off-stoichiometric copper indium sulfide quantum dots with emissions in the near-infrared spectral range. The photoluminescence properties of the dots, and in particular the appearance of dual emission at high Cu deficiency, were studied with temperature-dependent steady-state and transient photoluminescence spectroscopy. [ABSTRACT FROM AUTHOR]

A general, efficient strategy for a self-powered PEC immunoassay with an evident photocurrent response was proposed by separating the photoanode from recognition events. The immunoassay demonstrates the exciting features of both high sensitivity and anti-interference capabilities. [ABSTRACT FROM AUTHOR]