Moon, Sooyeon Yang, Jiwoo Kwon, Deok Hwang Cho, Daeheum Kim, Jae-Keun Shim, Jae Won Kim, Heesuk Lee, Takhee Jang, Hyejin Cho, Kyungjune Chung, Seungjun 2025-07-18T06:00:33Z 2025-07-18T06:00:33Z 2025-07-18 2025-06 1530-6984 https://pubs.kist.re.kr/handle/201004/152770 Ultrathin two-dimensional (2D) transition metal dichalcogenides (TMDs) exhibit unique band structures, allowing promising thermoelectric properties. Achieving a high power factor (PF) for thermoelectric generators (TEGs) requires optimizing both the Seebeck coefficient (S) and electrical conductivity (sigma). Conventional surface charge-transfer doping can be a solution to enhance sigma by introducing additional electrons. However, residual organic dopants act as charged impurities, degrading charge transport and lowering PF due to the intensified trade-off between carrier concentration and S. We propose a charged-impurity-free diffusion doping method for CVD-grown molybdenum disulfide (MoS2) to enhance PF. By depositing organic dopants on the contact region and enabling electron diffusion into the channel via carrier concentration gradients, sigma is improved while maintaining high S. This approach achieves a record-high PF of 1698 mu W/mK2 for CVD-grown TMDs. Our strategy offers a promising pathway to enhance thermoelectric performance, not limited by the exacerbated trade-off relationship observed in conventional doping methods. English American Chemical Society Achieving Boosted Thermoelectric Power Factor of MoS2 through Selective Charged-Impurity-Free Doping Article 10.1021/acs.nanolett.5c01649 1 Nano Letters, v.25, no.25, pp.9994 - 10002 Nano Letters 25 25 9994 10002 N scie scopus 001510176700001 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article THIN-FILMS RANGE thermoelectric 2D transition metal dichalcogenides diffusion charged-impurity-free doping Seebeckcoefficient