| 학회 | 한국화학공학회 |
| 학술대회 | 2016년 봄 (04/27 ~ 04/29, 부산 BEXCO) |
| 권호 | 22권 1호, p.846 |
| 발표분야 | 재료 |
| 제목 | Designing lead chalcogenide nanocrystals for electronic and optoelectronic devices through charge carrier control |
| 초록 | We report a simple, solution-based, postsynthetic colloidal, atomic layer deposition (PS-cALD) process to engineer stepwise the surface stoichiometry and therefore the electronic properties of lead chalcogenide nanocrystal (NC) thin films integrated in devices. We found that unlike chalcogen-enriched NC surfaces that are structurally, optically, and electronically unstable, lead chloride treatment creates a well-passivated shell that stabilizes the NCs. Based on this method, We study charge injection and transport in PbSe NC thin films. By engineering the contact metallurgy and NC ligand exchange chemistry and surface passivation, we demonstrate partial Fermi-level pinning at the metal–nanocrystal interface and an insulator-to-metal transition with increased coupling and doping, allowing us to design high conductivity and mobility PbSe NC thin films. We construct complementary nanocrystal circuits from n-type and p-type transistors realized from a single NC material by selecting the contact metallurgy. |
| 저자 | 오승주 |
| 소속 | 고려대 |
| 키워드 | 화공나노소재 ; 센서 및 소자 ; Nanofabrication ; Wet process |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
