通过在CsPbBr3纳米晶体中加入油胺铟(In(OAm)3)和支化三(二乙胺)膦(TDP)配体,在减缓晶体生长速度的同时促进取向生长,获得了CsPbBr3钙钛矿纳米棒材料。通过透射电子显微镜、X射线衍射系统、紫外-可见分光光度计、光致发光光谱仪对所制备的CsPbBr3钙钛矿纳米棒晶体特性进行表征,结果表明该纳米棒具有质量好、缺陷密度低、发光性能较好的优点;利用可变条纹长度和变功率PL光谱测得了样品的增益系数(860 cm -1)和阈值功率(17.5 μJ/cm 2);同时测量了样品在极端老化的双八五(温度85 ℃和相对湿度85%)条件下的发光稳定性,发现稳定性得到了提升。为实现高稳定性钙钛矿激光器提供了实验基础和材料支撑。

In this study, an intermediate monomer and a branched tris (diethylamino) phosphine (TDP) were employed in a CsPbBr3 perovskite nanocube solution to synthesize CsPbBr3 perovskite nanorods, ensuring both the slow growth rate and the orientation growth. Transmission electron microscopy, X-ray diffraction, ultraviolet-visible absorption spectroscopy, and photoluminescence (PL) spectroscopy were used to characterize the obtained material. It is found that the CsPbBr3 perovskite nanorods exhibit good crystal quality, low defect density, and favorable optical property. The gain coefficient (860 cm -1) and threshold (17.5 μJ/cm 2) were measured through the variable length stripe method and PL spectra under different pumping densities. Furthermore, the photostability of the sample at a high temperature and high relative humidity (85 ℃, 85%RH) was tested. It is found that the stability improved. Results provide experimental basis for the practical application of advanced perovskite-based lasers.