Multiple exciton generation in nanocrystal quantum dots – controversy, current status and future prospects

多激子产生 激子 纳米晶 量子点 太阳能电池 纳米技术 材料科学 比克西顿 带隙 光电子学 能量转换效率 太阳能电池效率 物理 凝聚态物理
作者
David J. Binks
出处
期刊:Physical Chemistry Chemical Physics [Royal Society of Chemistry]
卷期号:13 (28): 12693-12693 被引量:73
标识
DOI:10.1039/c1cp20225a
摘要

Multiple exciton generation is a process that can occur in quantum dots by which the energy of an absorbed photon in excess of the bandgap can be used to create one or more additional excitons instead of being wasted as heat. This effect has received considerable interest because it has the potential to significantly enhance the performance of solar cells, nanocrystal lasers, high speed electronic devices and photocatalysts. However, measuring the efficiency of multiple exciton generation is experimentally challenging and the results of these measurements have been the subject of some controversy. This Perspective describes the techniques used to determine the quantum yield of multiexcitons in nanocrystals and also details the experimental artefacts that can confuse these measurements and have been the source of much of the recent debate. The greater understanding of these artefacts that has emerged recently and the experimental techniques developed to eliminate their effects on quantum yield measurements will also be described. The efficiency of multiple exciton generation currently obtainable from nanocrystals and its potential impact on solar cell performance is assessed in the light of this improved experimental understanding. Whilst it is found the quantum yields thus far reported are insufficient to result in more than a modest increase in solar cell efficiency, an analysis of the expected performance of a nanocrystal engineered to maximise multiple exciton generation indicates that a significant improvement in solar cell performance is possible. Moreover, a nanocrystal design is proposed for optimised efficiency of multiple exciton generation which would allow its potential benefit to solar power production to be realised.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
2秒前
普鲁卡因完成签到,获得积分10
3秒前
倪塔宝贝完成签到 ,获得积分10
3秒前
小花生完成签到 ,获得积分10
3秒前
知了完成签到 ,获得积分10
7秒前
为你钟情完成签到 ,获得积分10
8秒前
11秒前
12秒前
韭菜盒子发布了新的文献求助10
14秒前
潘特发布了新的文献求助10
17秒前
乌滴子完成签到,获得积分10
18秒前
量子星尘发布了新的文献求助10
19秒前
善学以致用应助韭菜盒子采纳,获得10
19秒前
jiaaniu完成签到 ,获得积分10
21秒前
清脆靳完成签到,获得积分10
22秒前
cp3xzh完成签到,获得积分10
22秒前
tian发布了新的文献求助10
24秒前
tian发布了新的文献求助10
24秒前
明理宛秋完成签到 ,获得积分10
25秒前
S月小小完成签到,获得积分10
29秒前
斯文的慕儿完成签到 ,获得积分10
36秒前
keen完成签到 ,获得积分10
36秒前
韭菜盒子完成签到,获得积分20
37秒前
潘特完成签到,获得积分10
38秒前
小彭友完成签到,获得积分10
49秒前
50秒前
josie完成签到 ,获得积分10
54秒前
llll完成签到 ,获得积分10
54秒前
量子星尘发布了新的文献求助10
54秒前
韭菜发布了新的文献求助10
54秒前
外向的斑马完成签到 ,获得积分10
55秒前
村长热爱美丽完成签到 ,获得积分10
57秒前
尹尹关注了科研通微信公众号
59秒前
呆呆完成签到 ,获得积分10
1分钟前
xianyaoz完成签到 ,获得积分0
1分钟前
杨远杰完成签到,获得积分10
1分钟前
蓝桉完成签到 ,获得积分10
1分钟前
JuliaWang完成签到 ,获得积分10
1分钟前
无限的含羞草完成签到,获得积分10
1分钟前
八二力完成签到 ,获得积分10
1分钟前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038112
求助须知:如何正确求助?哪些是违规求助? 3575788
关于积分的说明 11373801
捐赠科研通 3305604
什么是DOI,文献DOI怎么找? 1819255
邀请新用户注册赠送积分活动 892655
科研通“疑难数据库(出版商)”最低求助积分说明 815022