Science Daily May 15, 2024 Chemical doping is an important approach to manipulating charge-carrier concentration and transport in organic semiconductors (OSCs) and it ultimately enhances device performance. However, conventional doping strategies often rely on the use of highly reactive dopants which are consumed during the doping process. Achieving efficient doping with weak and/or widely accessible dopants under mild conditions remains a considerable challenge. An international team of researchers (Sweden, Italy, South Korea, UK, Italy, USA – Georgia Institute of Technology) showed that a previously undescribed concept for the photocatalytic doping of OSCs that used air as a weak oxidant (p-dopant) […]
Tag Archives: Organic semiconductors
Breaking through the limits of stretchable semiconductors with molecular brakes that harness light
Science Daily June 9, 2023 Researchers in South Korea investigated the effects of an azide photocrosslinker’s molecular length and structure on the microstructural, electrical features, and stretchability of photocrosslinked conjugated polymer films. For a systematic comparison, they synthesized a series of nitrene-induced photocrosslinkers (n-NIPSs) with different numbers of ethylene glycol repeating units (n = 1, 4, 8, 13) that bridge two tetrafluoro-aryl azide end groups. Two semicrystalline conjugated polymers and two nearly amorphous conjugated polymers were co-processed with n-NIPSs and crosslinked by brief exposure to UV light. They found that among the synthesized n-NIPSs, the shortest one (1-NIPS) is the […]
Organic semiconductors curl up in the dark
Nanowerk January 17, 2023 Organic semiconductors have the potential to replace their silicon predecessors in many applications. However, the manufacturing processes of solar cells that achieve such efficiencies are not yet compatible with mass production. An international team of researchers (Denmark, Germany) used roll-to-roll methos to print the organic semiconductor (poly(3-hexylthiophene) or P3HT), used for flexible solar cells, and organic electronics directly on a polymer film. In solution without illumination or under red light, the polymer chains quickly aggregated and formed ordered domains. When illuminated under green or blue light, the more rigid polymer chains, excited by the light, were […]