论文总字数：19281字

摘 要

热电材料的工作机制是利用内部载体的运动来实现热能和电能的转换。简而言之，热电发电和恒温，制冷控制和温度测量是热电材料将热能和电能转换的性能。Bi₂O₂Se具有通过层叠Bi₂O₂层和Se层而形成的独特的层结构。Bi₂O₂Se是一种高速，低能耗的电子产品，具有良好的空气稳定性。在本设计中，制备了掺杂的复合材料键合剪切剥离Bi₂O₂Se，并分析了其对热电性能的影响。

本次实验主要分为掺杂和复合，即将Sb,Sn掺杂进Bi₂O₂Se中Bi位中，对制得样品进行电运输性能测试和热导率测试，并且与本征Bi₂O₂Se样品进行比较，结果预测得出掺杂后制成样品较本征Bi₂O₂Se样品电运输性能得到了提升。

将掺杂后样品与Cu₂Se，SnSe进行复合，再次对制得样品进行电运输性能测试和热导率测试，与本征Bi₂O₂Se和掺杂后产物Bi_2-xSn_xO₂Se，Bi_2-xSb_xO₂Se进行比较，结果预测得出结果并进行了原因分析。

关键词：Bi₂O₂Se热电材料 掺杂 复合 电运输性能

The doped composite shear stripping Bi₂O₂Se was prepared and its thermoelectric properties were analyzed

Abstract

The working mechanism of thermoelectric materials is to realize the conversion of heat and electric energy by using the motion of internal carrier. In short, thermoelectric power generation and constant temperature, refrigeration control and temperature measurement are the properties of thermoelectric materials to convert heat and electricity.Bi₂O₂Se has a unique layer structure formed by overlapping Bi₂O₂ and Se layers. The Bi₂O₂Se is a high speed, low energy consumption electronic product with good air stability. In this design, the doped composite bonded shear peel Bi₂O₂Se was prepared and its effect on thermoelectric properties was analyzed.

This experiment is mainly divided into doping and compound, which doping Sb and Sn into Bi bit of Bi₂O₂Se, conducting electrical transport performance test and thermal conductivity test on the prepared sample, and comparing with the intrinsic Bi₂O₂Se sample, the result predicts that the electrical transport performance of the prepared sample after doping is improved compared with the intrinsic Bi₂O₂Se sample.

The doped samples were compounded with Cu₂Se and SnSe, and the electrical transport performance and thermal conductivity of the prepared samples were tested again. The results were compared with the intrinsic Bi₂O₂Se and the doped products Bi_2-XSn_XO₂Se and Bi_2-XSb_XO₂Se. The results were predicted and the causes were analyzed.

Key words: Bi₂O₂Se thermoelectric material；Doped；composite；electrical transport performance

目 录

摘 要 I

Abstract II

第一章 绪论 1

1.1 引言 1

1.2 热电材料概况 1

1.3 热电材料研究背景 2

1.3.1 金属氧化物材料 2

1.3.2 笼式化合物材料 2

1.3.3 块体纳米材料 3

1.3.4 纳米金属硒化合物 3

1.4 Bi₂O₂Se层状化合物的研究现状 4

1.5 Cu₂Se的研究 5

1.6 SnSe的研究 5

1.7 课题内容及意义 6

第二章 实验方案 7

2.1 原料制备 7

2.1.1 Bi₂O₂Se的制备 7

2.1.2 Cu₂Se的制备 8

2.1.3 SnSe的制备 8

2.2 用Sn，Sb掺杂Bi₂O₂Se 9

2.3 用Bi_2-xSn_xO₂Se和Bi_2-xSb_xO₂Se分别与Cu₂Se和SnSe复合 10

2.3.1 本征Bi_2-xSn_xO₂Se和Bi_2-xSb_xO₂Se（水溶液剪切1h） 10

2.3.2 复合SnSe 11

2.3.3 复合Cu₂Se 12

第三章 预测分析方案 14

第四章 预测实验结论 15

参考文献 17

致 谢 19

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