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FARADAY DISCUSSIONS
Volume -, Issue -, Pages -Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3fd00127j
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The ongoing studies on organic thermoelectric materials have become increasingly intensive due to the urgent need for the development of flexible and lightweight thermoelectric generators that can generate electricity using waste heat. Among these studies, the giant Seebeck effect (GSE) in organic semiconductors has attracted attention. In thin films or single crystals of high purity organic small-molecule semiconductors, a reproducible observation of huge Seebeck coefficients (>0.1 V K-1) has been made in the temperature range near 300-400 K. This article presents the revealed facts and discusses unresolved mysteries.
A good solution for energy harvesting is to generate electricity using waste heat from our bodies or living environment. Therefore, the development of flexible and lightweight thermoelectric generators (TEGs) is urgently necessary, and studies on organic thermoelectric materials have become increasingly intensive. This article will present ongoing studies about a mysterious phenomenon in organic semiconductors, the giant Seebeck effect (GSE). The GSE was first discovered with pure C-60 thin films and eventually confirmed to occur in various organic semiconductors. In the thin films or single crystals of organic small-molecule semiconductors with high purity, i.e., small carrier density, huge Seebeck coefficients, >0.1 V K-1, were reproducibly observed in the temperature range near 300-400 K. The facts revealed by the experiments to date will be presented, and unresolved mysteries will be discussed.
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