Use of Organic Polymer P3HT:PC61BM as the Active Layer to Improve the Performance of ZnO Ultraviolet Photodetector

Abstract

One of the most interesting structures of organic photodetectors (OPDs) is the bulk heterojunction (BHJ), which can be achieved by mixing electron donors and electron acceptors in a suitable solvent and then spin-coating. BHJs have proven to be a very useful method to overcome the short diffusion length of organic semiconductor excitons. However, this structure enhances disorder and hinders the collection of photogenerated carriers. Therefore, it is very important to prepare OPDs with this structure. In this paper, we show how to use conjugate polymer donor poly­(3-hexylthiophene) (P3HT) and fullerene derivative acceptor 6,6-phenyl C61-butyric acid methyl ester (PC61BM) to form a binary BHJ active layer by spin-coating to improve the performance and detector wavelength of a ZnO ultraviolet (UV) photodetector (PD). Compared with the ZnO UV PD, the responsivity of the OPD can reach 0.58 A W–1, which is increased by about 7.14 times. Furthermore, the OPD shows improved absorption, high photocurrent to dark current ratio (1.63 × 104), and excellent detection capability (3.67 × 1012 Jones). The preparation of a new OPD by this work shows strong performance and provides a new idea for the research of OPD. Therefore, it is very important to design and manufacture ZnO UV PD to form a BHJ OPD with organic polymers P3HT:PC61BM.

Diarylethene-Type Photochromic Electron Traps Extending Narrow Linear Dynamic Range of Organic Photodetectors. Design Principles and Fate After Electron Transfer. Self-Destructive or Self-Protective?

“…Therefore, considering a broad range of HOMO (valence band maximum) and LUMO (conduction band minimum or EA) energies, −5.2 to −4.4 and −3.5 to −2.8 eV, respectively, − ,,,,,,− reported for the hosting donor polymer P3HT, we state additional criteria as follows.…”

“…(a) DAE photochromic switch and its example 4F-T-R2-R3, (b) p- and n-type organic semiconductor, P3TH and PCBM, and photovoltaic-type OPD using their blend as active layer (ref. , copyright 2021 ACS), and (c,d) a photocurrent–power plot showing an LDR extension achieved by P3HT:PCBM or P3HT/DAE (100:1) photoactive layers, which convert to photomultiplication-type OPD under strong illumination (edited from ref. with permission, copyright 2015 RSC).…”

Study on multifunctional resistive switching and UV light detection characteristics in p-PEDOT:PSS/i-BFO/n-ZnO hybrid structures

“…ReRAMs have attracted significant attention of researchers due to its simple structure (metal-semiconductor-metal), high speed, low power consumption, the potential for high-density integration, etc [9]. Consequently, several intermediate switching layers such as graphene oxide [10], selenides [11], transition metals oxides [12], and organic polymer composites [13] were investigated toward the fabrication of extremely efficient NVM devices. However, there is a substantial need for improvement in the uniformity and stability of ReRAM devices in their RS characteristics [14].…”

Efficient Ultrathin Self‐Powered Organic Photodetector with Reduced Exciton Binding Energy and Auxiliary Föster Resonance Energy Transfer Processes

“…[1][2][3][4][5][6][7][8][9][10][11][12] As an important alternative for traditional inorganic PD technology, especially silicon-based photodetectors, organic photodetectors (OPDs) offer the advantages of tunable detection wavelengths, simplified synthesis, low-cost fabrication, large-area production, and compatibility with lightweight and flexible. [13][14][15][16] Usually, external bias needs to be applied to drive the devices and enhance the photocurrent in organic photodetectors, which limits its operating conditions and environment. [16,17] Thus, developing self-powered photodetectors is an essential prerequisite for low-energy consumption optoelectronic devices that can work independently, wirelessly, and sustainably.…”