Temperature, and laser fluence swept millimeter wave response datasets for a 48,000 hour old encapsulated methyl ammonium lead iodide thin film

Metal halide perovskites are very strong candidates for use in photovoltaic conversion, as photodetectors, in optically pumped lasers and now in field effect transistors. We have subjected the very old thin film sample of Methylammonium lead Iodide (MAPbI3) with quartz substrate (glass encapsulated) to sweeping laser intensity and temperature (300K – 7K) simultaneously. Room temperature datasets of this old sample were already published in Mendeley Data, V4, doi: 10.17632/p65yxhdxkm.4 with all sample preparation and other details. These new data pertain to the IMPATT produced probe frequency of 120 GHz while 1 kHz pulsed laser beam at 532nm on the sample inside an ARS cryocooler model number DE-202/AI with Lakeshore 330 controller. The art of data collection remained the same however, the laser maximum fluence changed substantially in these sets of experiments due to passing the laser through the optical elements in the path and fitted on to the cryostat. The millimeter wave response ratio represents the lumped product of carrier-mobility and carrier concentrations for the given temperature and laser fluence levels. Carrier density changes with laser intensity nonlinearly, and the free carrier charge mobility changes with temperature and electric field of the probe beam. In our time-resolved TR-mmWC apparatus, the glass-covered sample was excited by a 1KHz triggered 532 nm laser beam with a width of 0.7 ns with maximum fluence 5.2 microjoules per sq. cm and a spot size around 10mm. Transient datasets were recorded using a 6 GHz input bandwidth digitizer after amplifying Schottky detector registered radiofrequency (RF) signal due to differential absorption of the passing millimeter wave from source (normal to sample) at 120 GHz through sample. Signal averaging was done 10,000 times and data of the same sample were collected on 2 different dates November 21, and November 23, 2023, respectively. The data attached are CSV files with column 1 being the pump-probe delay time (second), and column 2 being voltage response (V). Examples: File with name “November-23-2022-NCSU-Perovskite-Cryostat-200-8K-FullLaserPwr-120GHz.csv” means the date is Nov. 23, Temperature is 200.8K (un-calibrated) should read 7K (calibrated, DC 28.4 mV), Full Laser Power representing 5.2 microjoules/cm2 laser fluence, 250.8K should be read as 55K(DCV 28.4 mV), 350.8K as 151K (DCV 28.9 mV) and 443.8K as 241K (DCV 33.6 mV). For November 21, 2023, the temperature was swept more frequently. The filenames also carry the uncalibrated temperatures that the calibrated temperatures (K) should be read as 6.262 6.262 6.262 11.079 25.529 35.163 44.797 54.431 73.699 83.333 102.601 117.052 160.404 170.038 179.672 194.123 198.940 218.208 227.842 244.219 272.158 272.158 272.158 272.158 272.158 272.158 respectively. The DCV appears in the November 21 filenames themselves.金属卤化物钙钛矿（metal halide perovskites）是光伏转换、光电探测器、光泵浦激光器以及当前场效应晶体管领域极具潜力的候选材料。本研究针对石英衬底（玻璃封装）的碘化甲胺铅（MAPbI3）老旧薄膜样品，开展了激光强度与温度（300K至7K）同步扫描测试。该老旧样品的室温数据集已发表于《Mendeley Data》第4卷，DOI为10.17632/p65yxhdxkm.4，其中包含完整的样品制备方法与其他相关细节。本次新增数据集采用IMPATT产生的120 GHz探测频率，测试时将532 nm的1 kHz脉冲激光束照射置于ARS DE-202/AI型低温冷却器内的样品，该冷却器搭配Lakeshore 330型温控器。数据采集流程与此前一致，但由于激光需穿过低温恒温器上安装的光路光学元件，本批次实验的激光最大注量较此前发生了显著变化。毫米波响应比值代表给定温度与激光注量条件下，载流子迁移率与载流子浓度的集总乘积。载流子密度随激光强度呈非线性变化，而自由载流子迁移率则随温度与探测光束的电场发生变化。在本研究的时间分辨毫米波电导（TR-mmWC）测试装置中，玻璃封装的样品由1 kHz触发的532 nm激光束激发，该激光脉宽为0.7 ns，最大注量为5.2 微焦每平方厘米，光斑尺寸约为10 mm。针对120 GHz毫米波从垂直于样品方向入射并穿过样品时产生的差分吸收，通过肖特基探测器采集射频（RF）信号并放大后，采用6 GHz输入带宽的数字化仪记录瞬态数据集。实验进行了10000次信号平均，同一样品的数据集分别于2023年11月21日与11月23日采集完成。本次上传的数据集均为CSV格式文件，其中第1列为泵浦-探测延迟时间（单位：秒），第2列为电压响应（单位：伏特）。以文件名为"November-23-2022-NCSU-Perovskite-Cryostat-200-8K-FullLaserPwr-120GHz.csv"的文件为例，其对应采集日期为11月23日，文件名中的200.8K为未校准温度，经校准后应为7K（对应直流电压28.4 mV）；Full Laser Power代表激光注量为5.2 微焦/平方厘米；文件名中的250.8K、350.8K、443.8K经校准后分别对应55K（直流电压28.4 mV）、151K（直流电压28.9 mV）与241K（直流电压33.6 mV）。针对2023年11月21日的测试，温度扫描频率更高。文件名中附带的未校准温度对应的校准温度（单位：K）依次为：6.262、6.262、6.262、11.079、25.529、35.163、44.797、54.431、73.699、83.333、102.601、117.052、160.404、170.038、179.672、194.123、198.940、218.208、227.842、244.219、272.158、272.158、272.158、272.158、272.158、272.158。直流电压（DCV）信息已包含在11月21日的文件名中。