SOLID-STATE AND SURFACE-CHEMISTRY OF SN-DOPED IN2O3 CERAMICS

被引：44
作者：
COX, PA
FLAVELL, WR
EGDELL, RG
机构：
[1] INORGAN CHEM LAB, OXFORD OX1 3QR, ENGLAND
[2] UNIV LONDON IMPERIAL COLL SCI & TECHNOL, DEPT CHEM, S KENSINGTON, LONDON SW7 2AZ, ENGLAND
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 1987年 / 68卷 / 02期
关键词：
GLASS; -; Substrates; SPECTROSCOPY; ELECTRON; Applications;
D O I：
10.1016/0022-4596(87)90321-5
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Tin-doped indium oxide (ITO) ceramics prepared by a high-temperature solid-state synthetic procedure have been studied over the composition range 1-6 at. % Sn by X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS) and high-resolution electron energy loss spectroscopy (HREELS). Surface tin enrichment is evident from XPS with a heat of segregation of around minus 40 kJ mol** minus **1. It is concluded that electrons associated with segregated Sn ions in the topmost surface plane occupy a lone-pair-like sp hybrid surface state, while the region immediately below the surface is depleted in free carriers as a result of donor trapping effects and evaporation of tin during preparation.
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页码：340 / 350
页数：11
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