Related Experiment Video
Updated: Jun 19, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
Self-Powered Ultraviolet Photodetectors Enabled by Multisite Bonding at Imidazolate Framework-Polyethylenimine
Thi Muoi Vo1, Hoang Huy Vo Pham2, Chung Wung Bark1,3
1Department of Electrical Engineering, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Korea.
Abstract:
Self-powered ultraviolet (UV) photodetectors are attractive for energy-autonomous sensing, but achieving high detectivity with metal-organic frameworks remains challenging due to poor film morphology and leakage currents. Here, we fabricate a vertical photodiode (FTO/ZIF-8@PEI/PEDOT:PSS/Au) using a ZIF-8@polyethylenimine (PEI) hybrid film engineered through multisite Zn ← N coordination and hydrogen bonding. PEI stabilizes ZIF-8 dispersions, produces dense, crack-free films, and introduces a hole-blocking barrier that reduces the dark current. The resulting device exhibits robust self-powered UV photodetection (302 nm) with a responsivity of 37.3 mA/W, detectivity of 8.24 × 1012 Jones, and rapid rise/decay times of 0.504/0.582 s, maintaining stability after one month of operation. These results highlight the potential of MOF-polymer interfacial engineering as a practical strategy to suppress leakage and enhance the spectral selectivity in MOF-based photodetectors.
Related Concept Videos
UV–Vis Spectrometers
Gas Chromatography: Types of Detectors-II
Atomic Absorption Spectroscopy: Instrumentation
The atomizer used in AAS can be either a flame atomizer or an...
Atomic Emission Spectroscopy: Instrumentation
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Determination of Crystal Structures

