Antimony sulfide (Sb2S3) is a promising photoelectric material because of its wide bandgap approximately 1.7 eV for next‐generation solar cells, high optical absorption coefficient, and its green and earth‐abundant constituents. Different to traditional cubic structure photovoltaic materials, Sb2S3 holds one‐dimensional crystal structure and its thin film with [hk1] preferred orientation shows one‐order‐higher carrier transport mobility. However, all the reported Sb2S3 films exhibited [hk0] preferred orientation on CdS‐based superstrate device structure up to now. Thus, it is indispensable to study the controllable‐orientations Sb2S3 film deposition and the relationship between the orientation and performances. In this paper, we develop a vertical vapor transport deposition (V‐VTD) method, which can tune the preferred orientation of Sb2S3 thin film from [hk0] to [hk1] by reaction recipe monitoring. Combining the experiment results, a reasonable deposition/reevaporation competing model is suggested to explain above orientation conversion mechanism. The device efficiency increases from less than 2% to about 4% with the orientation of Sb2S3 film changing from [hk0] to [hk1]. By fine regulating the technique of deposition, the device with [hk1] orientation has better crystallinity, lower interface recombination, and higher built‐in voltage comparing with the [hk0] one. Finally, a champion power conversion efficiency (PCE) of 4.5% has been achieved, and the VOC of 730 mV is the top value among the Sb2S3 solar cells. The present versatile orientation tuning strategy could overcome the bottleneck of strong anisotropic materials and show high potential for noncubic material deposition and related optoelectronic device performance enhancement.

A series of Ce 3+ doped M3Al2O5Cl2 (M=Ca 2+ , Sr 2+ and Ba 2+) phosphor were synthesized by traditional solid phase reaction method and their optical properties were studied. XRD patterns show the phase formation of Sr3Al2O5Cl2. The excitation spectra of Sr3Al2O5Cl2:Ce 3+ phosphors indicated that it can be excited by near UV light between 250-375 nm, which is matched well with the ultraviolet (UV) chip. The emission spectra are an asymmetry broad band centered at 442 nm. The fluorescence lifetime of Sr3Al2O5Cl2:Ce 3+ phosphor was calculated as 56.65 nS. The effect of the concentration of Ce 3+ ions was investigated in detail and the quenching mechanism was given. The energy band and densities of state of M3Al2O5Cl2 were calculated by in the software CASTEP for the first time. The influence of Ca 2+ and Ba 2+ on the emission spectra of Sr3Al2O5Cl2:Ce 3+ are investigated. The results indicated that this M3Al2O5Cl2: Ce 3+ can be a better blue emitting candidate phosphor.

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Sr4‐xSi3O8Cl4:xEu3+ (SSOC:Eu3+) phosphors were successfully synthesized by hydrothermal method. The crystallization of this phosphor was analyzed by means of X‐ray diffraction patterns. The size and morphology were recorded using SEM patterns of samples. And the PLE and PL spectra were characterized by a PL spectrophotometer. Excited by 394 nm UV light, the intense red emission is recognized in SSOC:Eu3+ phosphor and the main emission peak located at 620 nm. The influences of Eu3+ concentration, pH value of reaction solution, and charge compensator on PL spectra of SSOC:Eu3+ phosphors were investigated. The results revealed that this red phosphor had potential applications for white LEDs.