研究目的
Investigating the characteristics of an organic photodetector with a small band-gap donor, PBDB-T, and a non-fullerene acceptor, ITIC, for indirect X-ray imaging.
研究成果
The study demonstrated that the organic photodetector with PBDB-T:ITIC active layer showed higher conversion efficiencies, better visible-light absorption, and carrier transport compared to the P3HT:PC70BM detector. The ZnSe(Te)-coupled detector with PBDB-T:ITIC = 1:1 layer showed significant improvements in CCD and sensitivity. The frequency response was also favorable, indicating potential for imaging applications.
研究不足
The absorption peak of the PBDB-T:ITIC layer was not well-matched with the emission properties of a CsI(Tl) scintillator, necessitating the use of a ZnSe(Te) scintillator. The study also highlighted the need for optimal mixing ratios and thicknesses of the active layer for improved performance.
1：Experimental Design and Method Selection:
The study involved the fabrication of an organic photodetector with PBDB-T and ITIC as the active layer, comparing its performance with a common P3HT:PC70BM detector. The methodology included evaluating the photodetector's performance under artificial solar irradiation and X-ray exposure.
2：Sample Selection and Data Sources:
The samples included detectors with different mixing ratios of PBDB-T:ITIC and a reference detector with P3HT:PC70BM. Data was collected using a solar simulator and an X-ray generator.
3：List of Experimental Equipment and Materials:
Equipment included a solar simulator, X-ray generator, electrometer, UV/vis spectrometer, and atomic force microscope. Materials included PBDB-T, ITIC, P3HT, PC70BM, and scintillators CsI(Tl) and ZnSe(Te).
4：Experimental Procedures and Operational Workflow:
The procedure involved fabricating the detectors, measuring their J-V characteristics under solar irradiation, evaluating their performance during X-ray exposure, and measuring the frequency response with a green LED.
5：Data Analysis Methods:
Data analysis included calculating power-conversion efficiency (PCE), short-circuit current density (JSC), collected current density (CCD), and sensitivity from the J-V characteristics.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
electrometer
2400
Keithley
To collect the generated carriers during the evaluation of the photodetector's performance.
-
ion chamber
CII50
Capintec
To measure the exposed dose during the X-ray exposure experiments.
-
oscilloscope
104Xi
LeCroy
To measure the signal response of the detectors during the frequency response evaluation.
-
silicon photodetector
S3590-08
Hamamatsu
Used as a reference during the frequency response evaluation.
-
solar simulator
XES 40S2-CE
San Ei Elec
To investigate the intrinsic characteristics of the photodetector under artificial solar irradiation.
-
X-ray generator
2000H
AJEX
To examine the properties of the scintillator-coupled detector during X-ray exposure.
-
UV/vis spectrometer
2120UV
Optizen
To measure the absorption spectra of the active layers and scintillators.
-
atomic force microscope
To measure the surface roughness of the active layers.
-
登录查看剩余6件设备及参数对照表
查看全部
