scholarly journals On the absence of triplet exciton loss pathways in non-fullerene acceptor based organic solar cells

2020 ◽  
Vol 7 (6) ◽  
pp. 1641-1649 ◽  
Author(s):  
Maria S. Kotova ◽  
Giacomo Londi ◽  
Johannes Junker ◽  
Stefanie Dietz ◽  
Alberto Privitera ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Triplet Exciton ◽  
Triplet States ◽  
Donor And Acceptor ◽  
Recombination Channel

Recombination to donor and acceptor triplet states should be energetically favourable. However, this recombination channel is not observed in operational devices.

Low Band-Gap Materials for Solar Cells

2021 ◽  
pp. 176-235
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
Chemical Properties ◽  
Low Energy ◽  
Practical Applications ◽  
Film Forming ◽  
Donor And Acceptor ◽  
Induced Charge

Organic solar cells (OSCs) are discussed at length in terms of its performance leading to the generation of electricity. The key materials required for OSCs are the small organic molecules having donor and acceptor with suitable light absorption and electro-chemical properties of low energy band gap. Various structural scaffolds are highlighted with their structural design leading to film forming in an orderly manner and this morphology of film having a pivotal role in photo-induced charge separation, migration and collection at an electrode. Present day research informs that OSCs involving non fullerene based donors and acceptors are functioning with high photo conversion efficiency [PCE] of >17% and are promising candidates for practical applications.

New Anthracene‐Fused Nonfullerene Acceptors for High‐Efficiency Organic Solar Cells: Energy Level Modulations Enabling Match of Donor and Acceptor

2019 ◽  
Vol 9 (12) ◽  
pp. 1803541 ◽  
Author(s):  
Huanran Feng ◽  
Yuan‐Qiu‐Qiang Yi ◽  
Xin Ke ◽  
Jing Yan ◽  
Yamin Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Level ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Donor And Acceptor

scholarly journals Modulated Photocurrent Spectroscopy for Determination of Electron and Hole Mobilities in Working Organic Solar Cells

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hiroki Nojima ◽  
Takashi Kobayashi ◽  
Takashi Nagase ◽  
Hiroyoshi Naito
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Physical Constant ◽  
Mixing Ratio ◽  
Photocurrent Spectroscopy ◽  
Donor And Acceptor ◽  
Device Structures ◽  
Electron Donor And Acceptor

AbstractCarrier drift mobility is an important physical constant in the charge transport process of organic solar cells (OSCs). Although time-of-flight and space-charge-limited current techniques have been frequently utilized for mobility measurements, the validity of a new method using modulation photocurrent spectroscopy is discussed in this contribution. The advantages of this method are its applicability to working OSCs with optimized device structures and the simultaneous determination of the electron and hole mobilities. These features make it possible to study the relation between the mobility balance and the solar cell characteristics, such as the power conversion efficiency, using only a single working OSC; hence, it is not necessary to fabricate electron-only and hole-only devices for mobility measurements. After carrying out numerical simulations to examine the validity of this method for mobility determination, the dependence of the mobility balance on the mixing ratio of the electron-donor and –acceptor materials is presented.

Development of New Materials and Structures for Efficient Organic Solar Cells Fabricated with Ionically and Electrically Conducting Polymers

2009 ◽  
Vol 1211 ◽  
Author(s):  
Yoshinori Nishikitani ◽  
Takaya Kubo ◽  
Hideki Masuda
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Organic Thin Film ◽  
New Materials ◽  
Surface Areas ◽  
Donor And Acceptor ◽  
Electrically Conducting Polymers ◽  
Ruthenium Dyes

AbstractNew materials and structures have been developed for efficient organic solar cells, dye-sensitized solar cells (DCSs) and organic thin-film solar cells (OPVs). Some strategies for achieving high photon-to-electricity conversion efficiency in these solar cells are discussed, focusing on nanostructured materials. In the case of DSCs, unlike TiO2 nanoparticles, TiO2 nanotubes with suitable dimensions are expected to work as efficient light scatterers as well as to give large surface areas for charge separation. A strategy for designing triarylamine-functionalized ruthenium dyes, which display the high efficiency, is also proposed. Furthermore, OPVs based on donor/acceptor (D/A) block copolymers are discussed, focusing on the phase separation of donor and acceptor segments and their domain sizes.

scholarly journals Individual nanostructure optimization in donor and acceptor phases to achieve efficient quaternary organic solar cells

Nano Energy ◽  
2019 ◽  
Vol 66 ◽  
pp. 104176 ◽  
Author(s):  
Zhaozhao Bi ◽  
Hafiz Bilal Naveed ◽  
Xinyu Sui ◽  
Qinglian Zhu ◽  
Xianbin Xu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Donor And Acceptor

scholarly journals 15.34% efficiency all-small-molecule organic solar cells with an improved fill factor enabled by a fullerene additive

2020 ◽  
Vol 13 (7) ◽  
pp. 2134-2141 ◽  
Author(s):  
Dingqin Hu ◽  
Qianguang Yang ◽  
Haiyan Chen ◽  
Friso Wobben ◽  
Vincent M. Le Corre ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Fill Factor ◽  
Donor And Acceptor ◽  
Bimolecular Recombination

A fullerene additive adjusts the miscibility between donor and acceptor for morphology optimization and reduces bimolecular recombination, assisting significant improvement of fill factor and efficiency.

scholarly journals Optimization of solution-processed oligothiophene:fullerene based organic solar cells by using solvent additives

2013 ◽  
Vol 4 ◽  
pp. 680-689 ◽  
Author(s):  
Gisela L Schulz ◽  
Marta Urdanpilleta ◽  
Roland Fitzner ◽  
Eduard Brier ◽  
Elena Mena-Osteritz ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Solution Processed ◽  
Heterojunction Solar Cells ◽  
Force Microscopy ◽  
Vacuum Technology ◽  
Atomic Force ◽  
Donor And Acceptor ◽  
Conversion Efficiencies

The optimization of solution-processed organic bulk-heterojunction solar cells with the acceptor-substituted quinquethiophene DCV5T-Bu 4 as donor in conjunction with PC61BM as acceptor is described. Power conversion efficiencies up to 3.0% and external quantum efficiencies up to 40% were obtained through the use of 1-chloronaphthalene as solvent additive in the fabrication of the photovoltaic devices. Furthermore, atomic force microscopy investigations of the photoactive layer gave insight into the distribution of donor and acceptor within the blend. The unique combination of solubility and thermal stability of DCV5T-Bu 4 also allows for fabrication of organic solar cells by vacuum deposition. Thus, we were able to perform a rare comparison of the device characteristics of the solution-processed DCV5T-Bu 4 :PC61BM solar cell with its vacuum-processed DCV5T-Bu 4 :C60 counterpart. Interestingly in this case, the efficiencies of the small-molecule organic solar cells prepared by using solution techniques are approaching those fabricated by using vacuum technology. This result is significant as vacuum-processed devices typically display much better performances in photovoltaic cells.

Crystalline Cooperativity of Donor and Acceptor Segments in Double‐Cable Conjugated Polymers toward Efficient Single‐Component Organic Solar Cells

2019 ◽  
Vol 131 (43) ◽  
pp. 15678-15686 ◽  
Author(s):  
Cheng Li ◽  
Xianxin Wu ◽  
Xinyu Sui ◽  
Hongbo Wu ◽  
Chao Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conjugated Polymers ◽  
Organic Solar Cells ◽  
Single Component ◽  
Donor And Acceptor
Sign in / Sign up

Export Citation Format

Share Document