亲爱的研友该休息了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!身体可是革命的本钱,早点休息,好梦!

Insight into the Origin of Trapping in Polymer/Fullerene Blends with a Systematic Alteration of the Fullerene to Higher Adducts

富勒烯 离域电子 聚合物 材料科学 化学物理 超快激光光谱学 轨道能级差 光化学 光谱学 化学 有机化学 分子 物理 量子力学 复合材料
作者
Jose Marin-Beloqui,Guanran Zhang,Junjun Guo,Jordan Shaikh,Thibaut Wohrer,Seyed Mehrdad Hosseini,Bowen Sun,James D. Shipp,Alexander J. Auty,Dimitri Chekulaev,Jun Ye,Yi-Chun Chin,Michael B. Sullivan,Attila J. Mozer,Ji-Seon Kim,Safa Shoaee,Tracey M. Clarke
出处
期刊:Journal of Physical Chemistry C [American Chemical Society]
标识
DOI:10.1021/acs.jpcc.1c10378
摘要

The bimolecular recombination characteristics of conjugated polymer poly[(4,4'-bis(2-ethylhexyl)dithieno[3,2-b:2',3'-d]silole)-2,6-diyl-alt-(2,5-bis 3-tetradecylthiophen-2-yl thiazolo 5,4-d thiazole)-2,5diyl] (PDTSiTTz) blended with the fullerene series PC60BM, ICMA, ICBA, and ICTA have been investigated using microsecond and femtosecond transient absorption spectroscopy, in conjunction with electroluminescence measurements and ambient photoemission spectroscopy. The non-Langevin polymer PDTSiTTz allows an inspection of intrinsic bimolecular recombination rates uninhibited by diffusion, while the low oscillator strengths of fullerenes allow polymer features to dominate, and we compare our results to those of the well-known polymer Si-PCPDTBT. Using μs-TAS, we have shown that the trap-limited decay dynamics of the PDTSiTTz polaron becomes progressively slower across the fullerene series, while those of Si-PCPDTBT are invariant. Electroluminescence measurements showed an unusual double peak in pristine PDTSiTTz, attributed to a low energy intragap charge transfer state, likely interchain in nature. Furthermore, while the pristine PDTSiTTz showed a broad, low-intensity density of states, the ICBA and ICTA blends presented a virtually identical DOS to Si-PCPDTBT and its blends. This has been attributed to a shift from a delocalized, interchain highest occupied molecular orbital (HOMO) in the pristine material to a dithienosilole-centered HOMO in the blends, likely a result of the bulky fullerenes increasing interchain separation. This HOMO localization had a side effect of progressively shifting the polymer HOMO to shallower energies, which was correlated with the observed decrease in bimolecular recombination rate and increased "trap" depth. However, since the density of tail states remained the same, this suggests that the traditional viewpoint of "trapping" being dominated by tail states may not encompass the full picture and that the breadth of the DOS may also have a strong influence on bimolecular recombination.
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
8秒前
lijiawei发布了新的文献求助10
10秒前
Criminology34发布了新的文献求助50
12秒前
睡觉补充能量完成签到,获得积分10
12秒前
fengfenghao完成签到,获得积分10
18秒前
小凯完成签到 ,获得积分10
21秒前
jueshadi完成签到 ,获得积分10
21秒前
朵朵完成签到,获得积分10
23秒前
28秒前
32秒前
dong发布了新的文献求助10
33秒前
35秒前
35秒前
35秒前
aaaaal发布了新的文献求助10
37秒前
39秒前
annaanna完成签到 ,获得积分10
41秒前
Criminology34发布了新的文献求助50
43秒前
ccc完成签到 ,获得积分10
43秒前
45秒前
YY发布了新的文献求助10
45秒前
Gin发布了新的文献求助10
48秒前
aaaaal完成签到,获得积分10
48秒前
Becky完成签到 ,获得积分10
51秒前
52秒前
杨北风完成签到 ,获得积分20
52秒前
科研通AI6应助科研通管家采纳,获得10
53秒前
54秒前
共享精神应助科研通管家采纳,获得10
54秒前
54秒前
所所应助科研通管家采纳,获得10
54秒前
54秒前
54秒前
Hello应助科研通管家采纳,获得10
54秒前
小蘑菇应助科研通管家采纳,获得10
54秒前
54秒前
ye发布了新的文献求助20
57秒前
58秒前
59秒前
Abu完成签到 ,获得积分10
1分钟前
高分求助中
(应助此贴封号)【重要!!请各用户(尤其是新用户)详细阅读】【科研通的精品贴汇总】 10000
Architectural Corrosion and Critical Infrastructure 1000
Early Devonian echinoderms from Victoria (Rhombifera, Blastoidea and Ophiocistioidea) 1000
By R. Scott Kretchmar - Practical Philosophy of Sport and Physical Activity - 2nd (second) Edition: 2nd (second) Edition 666
Electrochemistry: Volume 17 600
Physical Chemistry: How Chemistry Works 500
SOLUTIONS Adhesive restoration techniques restorative and integrated surgical procedures 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 内科学 生物化学 物理 计算机科学 纳米技术 遗传学 基因 复合材料 化学工程 物理化学 病理 催化作用 免疫学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 4944655
求助须知:如何正确求助?哪些是违规求助? 4209521
关于积分的说明 13085355
捐赠科研通 3989302
什么是DOI,文献DOI怎么找? 2184055
邀请新用户注册赠送积分活动 1199418
关于科研通互助平台的介绍 1112457