Improving the photo current of the [60]PCBM/P3HT photodetector device by using wavelength-matched photonic crystals

Abstract

A facile method for improving the photo current of the [60]PCBM ([6,6]-phenyl-C 61 -butyric acid methyl ester)/P3HT (poly(3-hexylthiophene)) photodetector device is demonstrated, and 1.6 times enhancement of the on/off ratio of the device is obtained by using wavelength-matched photonic crystals as substrates.

One-Step Coating Processed Phototransistors Enabled by Phase Separation of Semiconductor and Dielectric Blend Film

“…Among the OSC:polymer blend systems, P3HT:PMMA blend film with a certain proportion can form a self-stratified structure with a PMMA-bottom and P3HT-top by one-step spin coating [29]. In addition, owing to the ability of capturing and converting incident light into detectable electrical signals, P3HT was also widely used as organic semiconductor material of detectors [30,31,32]. Excitingly, combining the advantages of P3HT in phase separation in the blend system and its unique optical absorption capability would be a very good direction to realize high sensitivity phototransistors with simple fabrication processes.…”

PIN architecture for ultrasensitive organic thin film photoconductors

“…Poly(3-hexylthiophene) (P3HT)/6,6-phenyl-C61-butyric acid ethyl ester (PCBM) has been widely used as a classic donor/acceptor combination (P3HT is P-type semiconductor and PCBM is N-type semiconductor), and serves as a solid base for fundamental studies and conceptual demonstrations in organic photoelectric devices 12 13 14 15 . For the development of organic thin film photoconductors (OTFPs), in the early days Peet et al 13 tried to enhance the performance by optimizing the nano-morphology of the P3HT:PCBM blend film to maximize the number of free photo carriers.…”

“…Later, Liao et al 14 used [70]PCBM (analogue of PCBM and displays improved light absorption 16 ) to replace the PCBM in the blend, the device performance is improved due to the enhanced light absorption. Recently, Li et al 15 successfully further improved the performance of the P3HT:PCBM photoconductor using a substrate with patterned photonic crystals (which increases the reflection light and hence increases the light absorption of the blend film). However, performances of these devices remain unsatisfactory: responsivity (R), the parameter characterizing the sensitivity of a photoconductor to light, is below 1 AW −1 .…”

Near infrared organic photodetectors based on enhanced charge transfer state absorption by photonic architectures

“…Recently, the use of metal cavities has led to an impressive photoresponse in OPDs beyond the bandgaps of the composing materials. [22][23][24][25] When using optical micro-cavities the detection wavelength can be tuned by accurately controlling the cavity dimensions, i.e., the active layer thickness. While these devices exhibit a very good performance, the resonant frequency critically depends on film thickness, thus they may not be compatible with techniques such as roll to roll, in which thickness usually fluctuates within a certain tolerance.…”