A high throughput combinatorial synthesis utilizing inkjet printing of precursor inks was used to rapidly evaluate Bi-alloying into double perovskite oxides for enhanced visible light absorption. The fast visual screening of photo image scans of the library plates identifies 4-metal oxide compositions displaying an increase in light absorption, which subsequent UV–vis spectroscopy indicates is due to bandgap reduction. Structural characterization by X-ray diffraction (XRD) and Raman spectroscopy demonstrates that the visually darker composition range contains Bi-alloyed Sm₂MnNiO₆ (double perovskite structure), of the form (Bi,Sm)₂MnNiO₆. Bi alloying not only increases the visible absorption but also facilitates crystallization of this structure at the relatively low annealing temperature of 615 °C. Investigation of additional seven combinations of a rare earth (RE) and a transition metal (TM) with Bi and Mn indicates that Bi-alloying on the RE site occurs with similar effect in the family of rare earth oxide double perovskites.

中文翻译：

---

铋合金化成稀土双钙钛矿增强可合成性和可见光吸收

利用前体油墨的喷墨印刷的高通量组合合成被用于快速评估双钙钛矿氧化物的双合金化，以增强可见光吸收。库板照片图像扫描的快速视觉筛选确定了显示光吸收增加的 4-金属氧化物组合物，随后的 UV-vis 光谱表明这是由于带隙减少。X 射线衍射 (XRD) 和拉曼光谱的结构表征表明，在视觉上较暗的组成范围包含 Bi-合金化 Sm ₂ MnNiO ₆（双钙钛矿结构），形式为 (Bi,Sm) ₂ MnNiO ₆. 铋合金化不仅增加了可见光吸收，而且在 615 °C 的相对较低的退火温度下促进了这种结构的结晶。对稀土 (RE) 和过渡金属 (TM) 与 Bi 和 Mn 的另外七种组合的研究表明，在稀土氧化物双钙钛矿家族中，RE 位点上的铋合金化发生了类似的效果。