Hua Tang

The development of cost-effective, large-area photodetectors using gradient AgInS ₂ (Se) thin films offers broad-spectrum responsiveness, showing great potential for biological sensing, particularly in scenarios requiring W ⁻¹ level responsivity.

Efficient storage media are crucial for practical applications of hydrogen, which is the most promising clean energy resource. In addition to possessing a highly reversible gravimetric capacity, the stability and superlight mass of potential storage media should not be underestimated. In this study, we exploit the light mass and unique puckered structure of penta-BCNs to design Li-decorated penta-BCNs for hydrogen storage via a series of first-principles calculations. Our results reveal that Li atoms can form stable chemical complexes with the surface of penta-BCNs with an average binding energy of -2.21 eV without causing deformation. Each Li@penta-BCN unit can physically adsorb up to 27H₂ molecules, and the highest hydrogen storage capacity can reach 7.44 wt %, with an average adsorption energy of -0.16 eV/H₂, surpassing the target value of 5.5 wt % set by the U.S. Department of Energy. Further elaborate analysis of the electronic structure shows the polarization enhancement mechanism, which is caused by charge transfer from Li atoms to the penta-BCN surface. Our results indicate that Li-decorated penta-BCN could be a promising hydrogen storage material for further application and inspire the theoretical or experimental design of novel materials for clean energy.

A double absorber solar cell based on AgSb(S,Se)₂ is designed. Films are prepared by spray pyrolysis; a gradient band structure is obtained by selenization. The grains of the two absorption layers intersperse with each other at their interface to form a transition zone. A PCE of 3.57% is attained.

Broadband AgSbS ₂ (Se) photodetectors are fabricated using spray pyrolysis with a post-selenization process. Indium nitrate is introduced to break the surface blockade to selenidation, largely enhancing the light response range and photocurrent.