Data for Microsecond Carrier Lifetimes, Controlled p-Doping, and Enhanced Air Stability in Low-Bandgap Metal Halide Perovskites

All measurements are on low bandgap formamidinium lead-tin iodide metal halide perovskite films (FASn0.5Pb0.5I3) with a small quantity of zinc iodide added to the precursor solution (where x is the molarity of ZnI2 relative to that of FAI in the precursor). 1. shows photoluminescence quantum efficiency measurements when exciting with a 647nm laser. Time correlated single photon counting measurements (a measure of the photoluminescence lifetime) are in 2., when samples were excited by a 635nm pulsed laser. 3. is the decay of the ground state bleach following photo-excitation, as measured in transient absorption spectroscopy (532nm excitation). This data was calibrated to quantity the excitation density within the film as a function of time following photoexcitiation. 4. is the response of perovskite films when fabricated on a bottom gate/bottom contact transistor device, when in the dark and under different levels of white light illumination. 5. shows standard solar cell characterisation for thin absorber layers incorporated into a full solar cell stack. 6. is the percentage change in lattice parameter found from X-ray diffraction measurements of the different films. 7. is the cross section chemical distribution, as measured in scanning transmission electron microscopy energy-dispersive X-ray (STEM-EDX) spectroscopy.

本数据集所有测试均针对前驱体溶液中添加少量碘化锌的低带隙甲脒铅锡碘化物卤化物钙钛矿薄膜（FASn0.5Pb0.5I3）开展，其中x为前驱体中ZnI₂相对于FAI的摩尔浓度。数据集1展示了在647nm激光激发下的光致发光量子效率（photoluminescence quantum efficiency）测试结果。数据集2为时间相关单光子计数（time correlated single photon counting）测试结果，该手段用于表征光致发光寿命，测试时样品由635nm脉冲激光激发。数据集3为光激发后基态漂白的衰减曲线，通过瞬态吸收光谱（transient absorption spectroscopy）测得，激发波长为532nm。本数据集已完成校准，以量化光激发后薄膜内激发密度随时间的变化关系。数据集4为制备于底栅/底接触晶体管器件上的钙钛矿薄膜在暗态及不同强度白光照射下的响应特性。数据集5展示了集成于完整太阳能电池堆叠结构中的薄吸收层的标准太阳能电池表征结果。数据集6为不同薄膜经X射线衍射（X-ray diffraction）测试所得的晶格参数变化百分比。数据集7为通过扫描透射电子显微镜能量色散X射线光谱（scanning transmission electron microscopy energy-dispersive X-ray spectroscopy, STEM-EDX）测得的截面化学分布情况。