发明名称 |
Methods for preparing colloidal nanocrystal-based thin films |
摘要 |
Methods of exchanging ligands to form colloidal nanocrystals (NCs) with chalcogenocyanate (xCN)-based ligands and apparatuses using the same are disclosed. The ligands may be exchanged by assembling NCs into a thin film and immersing the thin film in a solution containing xCN-based ligands. The ligands may also be exchanged by mixing a xCN-based solution with a dispersion of NCs, flocculating the mixture, centrifuging the mixture, discarding the supernatant, adding a solvent to the pellet, and dispersing the solvent and pellet to form dispersed NCs with exchanged xCN-ligands. The NCs with xCN-based ligands may be used to form thin film devices and/or other electronic, optoelectronic, and photonic devices. Devices comprising nanocrystal-based thin films and methods for forming such devices are also disclosed. These devices may be constructed by depositing NCs on to a substrate to form an NC thin film and then doping the thin film by evaporation and thermal diffusion. |
申请公布号 |
US9336919(B2) |
申请公布日期 |
2016.05.10 |
申请号 |
US201313969863 |
申请日期 |
2013.08.19 |
申请人 |
The Trustees of the University of Pennsylvania |
发明人 |
Kagan Cherie R.;Fafarman Aaron T.;Choi Ji-Hyuk;Koh Weon-kyu;Kim David K.;Oh Soong Ju;Lai Yuming;Hong Sung-Hoon;Saudari Sangameshwar Rao;Murray Christopher B. |
分类号 |
H01B1/06;B05D1/18;B82Y10/00;B82Y40/00;H01L29/41;H01L29/786;H01L31/032;H01L31/07;H01L29/06;H01L29/12;H01L29/18 |
主分类号 |
H01B1/06 |
代理机构 |
RatnerPrestia |
代理人 |
RatnerPrestia |
主权项 |
1. A method of preparing a dispersion of colloidal nanocrystals (NCs) for use as NC thin films, the method comprising the steps of:
depositing a dispersion of NCs capped with ligands on a substrate; and immersing the substrate with the deposited NCs in a solution containing chalcogenocyanate (xCN)-based ligands to exchange the ligands of the deposited NCs with the xCN-based ligands. |
地址 |
Philadelphia PA US |