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.

Efficient fullerene-free organic solar cells based on fused-ring oligomer molecules

2016 ◽  
Vol 4 (4) ◽  
pp. 1486-1494 ◽  
Author(s):  
Yuze Lin ◽  
Jiayu Wang ◽  
Tengfei Li ◽  
Yang Wu ◽  
Cheng Wang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
High Crystallinity ◽  
Donor And Acceptor ◽  
Fused Ring ◽  
Small Phase

Organic solar cells based on monodisperse fused-ring oligomer molecule donor and acceptor blends exhibit a power conversion efficiency of over 6%; high crystallinity and small phase separation coexist in the blends.

High-efficiency non-fullerene organic solar cells enabled by a difluorobenzothiadiazole-based donor polymer combined with a properly matched small molecule acceptor

2015 ◽  
Vol 8 (2) ◽  
pp. 520-525 ◽  
Author(s):  
Jingbo Zhao ◽  
Yunke Li ◽  
Haoran Lin ◽  
Yuhang Liu ◽  
Kui Jiang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Power Conversion ◽  
Donor And Acceptor ◽  
Conversion Efficiencies ◽  
Matched Donor

Non-fullerene organic solar cells with power conversion efficiencies of up to 6.3% are reported using properly matched donor and acceptor.

A solution-processable bipolar diketopyrrolopyrrole molecule used as both electron donor and acceptor for efficient organic solar cells

2015 ◽  
Vol 3 (5) ◽  
pp. 1902-1905 ◽  
Author(s):  
Hangqi Shi ◽  
Weifei Fu ◽  
Minmin Shi ◽  
Jun Ling ◽  
Hongzheng Chen
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Transport Properties ◽  
Electron Donor ◽  
Organic Solar Cells ◽  
Energy Levels ◽  
Donor And Acceptor ◽  
Solution Processable ◽  
Electron Donor And Acceptor ◽  
Bipolar Charge

A DPP molecule has appropriate energy levels and bipolar charge-transport properties for both donor and acceptor in OSCs.

scholarly journals Efficient non-fullerene organic solar cells employing sequentially deposited donor–acceptor layers

2018 ◽  
Vol 6 (37) ◽  
pp. 18225-18233 ◽  
Author(s):  
Jiangbin Zhang ◽  
Bin Kan ◽  
Andrew J. Pearson ◽  
Andrew J. Parnell ◽  
Joshaniel F. K. Cooper ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Fabrication Method ◽  
Donor And Acceptor ◽  
Donor Acceptor

A new fabrication method via sequentially depositing donor and acceptor layers can push the power conversion efficiency of organic solar cells based on non-fullerene acceptors to over 10%.

New solution processed bulk-heterojunction organic solar cells based on a triazine-bridged porphyrin dyad as electron donor

RSC Advances ◽  
2014 ◽  
Vol 4 (92) ◽  
pp. 50819-50827 ◽  
Author(s):  
Ganesh D. Sharma ◽  
Galateia E. Zervaki ◽  
Panagiotis Angaridis ◽  
Athanassios G. Coutsolelos
Keyword(s):  
Solar Cells ◽  
Active Layer ◽  
Electron Donor ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Solution Processed ◽  
Zinc Porphyrin ◽  
Donor And Acceptor ◽  
Electron Donor And Acceptor ◽  
Covalently Linked

An unsymmetrical porphyrin dyad (ZnP)-[triazine-Npip]-(ZnPCOOH) consisting of two zinc-porphyrin units covalently linked to a peridine-containing triazine group has been used with PC71BM as electron donor and acceptor, respectively, for the active layer of solution-processed BHJ organic solar cells.

scholarly journals Correction: Towards predicting the power conversion efficiencies of organic solar cells from donor and acceptor molecule structures

2020 ◽  
Vol 8 (4) ◽  
pp. 1475-1476
Author(s):  
Yecheng Zhou ◽  
Guankui Long ◽  
Ailin Li ◽  
Angus Gray-Weale ◽  
Yongsheng Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Power Conversion ◽  
Acceptor Molecule ◽  
Donor And Acceptor ◽  
Conversion Efficiencies

Correction for ‘Towards predicting the power conversion efficiencies of organic solar cells from donor and acceptor molecule structures’ by Yecheng Zhou et al., J. Mater. Chem. C, 2018, 6, 3276–3287.

Influence of additives in bulk heterojunction solar cells using magnesium tetraethynylporphyrin with triisopropylsilyl and anthryl substituents

2014 ◽  
Vol 18 (08n09) ◽  
pp. 735-740 ◽  
Author(s):  
Takafumi Nakagawa ◽  
Junichi Hatano ◽  
Yutaka Matsuo
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Electron Donor ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Acid Methyl Ester ◽  
Heterojunction Solar Cells ◽  
Donor And Acceptor

We designed and synthesized anthryl-disubstituted magnesium tetraethynylporphyrin([{5,15-bis(anthracen-9′-yl)ethynyl}-10,20-bis{(triisopropylsilyl)ethynyl}porphyrinato] magnesium(II)), and applied it as an electron donor to solution-processed bulk heterojunction small molecule organic solar cells. The compound was characterized by single crystal X-ray crystallography as well as UV-vis light absorption spectrum showing the absorption maximum and onset at 700 and 740 nm, respectively. Organic solar cells using this compound and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) as electron donor and acceptor, respectively, showed power conversion efficiency of 1.31% at the donor and acceptor ratio of 1:3. The use of pyridine as a coordinating additive increased power conversion efficiency to 1.61%, which was the best among tested additives, THF, pyradine, dioxane, and 1,8-diiodooctane.

Sign in / Sign up

Export Citation Format

Share Document