scholarly journals Interpreting the Density of States Extracted from Organic Solar Cells Using Transient Photocurrent Measurements

2013 ◽  
Vol 117 (24) ◽  
pp. 12407-12414 ◽  
Author(s):  
Roderick C. I. MacKenzie ◽  
Chris G. Shuttle ◽  
George F. Dibb ◽  
Neil Treat ◽  
Elizabeth von Hauff ◽  
...  
Keyword(s):  
Solar Cells ◽  
Density Of States ◽  
Organic Solar Cells ◽  
Transient Photocurrent

Uphill and downhill charge generation from charge transfer to charge separated states in organic solar cells

2021 ◽  
Author(s):  
Shahidul Alam ◽  
Vojtech Nádaždy ◽  
Tomáš Váry ◽  
Christian Friebe ◽  
Rico Meitzner ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Solar Cells ◽  
Charge Transfer ◽  
Energy Level ◽  
Density Of States ◽  
Organic Solar Cells ◽  
Joint Density ◽  
Charge Generation ◽  
Donor Acceptor

Energy level alignments at the organic donor–acceptor interface cannot be predicted from cyclic voltammetry. Onsets for joint density of states and charge generation, reveal cases of energy uphill and – newly observed – downhill charge generation.

On the modeling of dispersive transient photocurrent response of organic solar cells

2019 ◽  
Vol 70 ◽  
pp. 42-47 ◽  
Author(s):  
Di Zhang ◽  
Anis Allagui ◽  
Ahmed S. Elwakil ◽  
Ahmed M. Nassef ◽  
Hegazy Rezk ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Photocurrent Response ◽  
Transient Photocurrent

scholarly journals Efficient Molecular Modelling of Butterfly-Shaped Hole Transport Materials With Remarkable Photovoltaic Properties For High-Performance Organic Solar Cells

2021 ◽  
Author(s):  
Muhammad Yasir Mehboob ◽  
Muhammad Adnan ◽  
Riaz Hussain ◽  
Zobia Irshad
Keyword(s):  
Solar Cells ◽  
Density Of States ◽  
Organic Solar Cells ◽  
Density Functional ◽  
Transition Density ◽  
Open Circuit ◽  
Hole Transport ◽  
Excitation Energies ◽  
Strong Electron ◽  
Photovoltaic Properties

Abstract Currently, organic solar cells (OSCs) with non-fullerene electron acceptors offer the highest efficiencies among all reported OSCs. To further improve the efficiencies and stabilities of fullerene-free organic solar cells, end-capped acceptor variations is built with strong electron withdrawing groups. In this report, we have theoretically calculated five new butterfly-shaped fullerene-free acceptors (FD1-FD6) by making end-capped modifications on reference molecule (R) with the purpose to study the improvement in photophysical, opto-electronic, and photo-voltaic properties of newly designed molecules by employing density functional theory (DFT) and time dependent (TD-DFT). Besides, some properties like position of frontier molecular orbitals (FMOs), excitation and binding energy, hole-electron overlap, density of states, overlap density of states, molecular electrostatic potential, open circuit voltage, transition density matrix, and reorganizational energy of electron and hole are also considered and associated with experimentally synthesized reference compound. All calculated molecules displayed a good red-shifting with high charge mobility of electrons among low binding and excitation energies as opposed to reference molecule. Furthermore, all designed molecules (FD1-FD6) and the reference R shows narrow band-gap along-with great charge shifting capability. This theoretical framework proves that end-capped acceptors variation is a modest and effective strategy to accomplish the desirable opto-electronic properties. Therefore, FD1-FD6 are suggested to experimentalist for out-looking future developments to fabricate highly efficient solar cells devices.

A simple method to experimentally determine the accurate RC-constant in nanosecond timescale transient photocurrent measurements on organic solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (125) ◽  
pp. 103403-103409 ◽  
Author(s):  
Jin Xiang ◽  
Lun Cai ◽  
Yan Qing Yao ◽  
Bao Fu Ding ◽  
Kamal Alameh ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Simple Method ◽  
Transient Photocurrent ◽  
Rc Constant

Experimentally determine the RC-constant in ns-TPC measurements on OSCs.

scholarly journals Linking Vertical Bulk-Heterojunction Composition and Transient Photocurrent Dynamics in Organic Solar Cells with Solution-Processed MoOxContact Layers

2013 ◽  
Vol 4 (5) ◽  
pp. 1301290 ◽  
Author(s):  
Bertrand J. Tremolet de Villers ◽  
Roderick C. I. MacKenzie ◽  
Jacek J. Jasieniak ◽  
Neil D. Treat ◽  
Michael L. Chabinyc
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Bulk Heterojunction ◽  
Solution Processed ◽  
Transient Photocurrent

Enhanced absorbance and electron collection in inverted organic solar cells: Optical admittance and transient photocurrent analyses

2014 ◽  
Vol 15 (7) ◽  
pp. 1306-1311 ◽  
Author(s):  
Zhiming Kam ◽  
Qingyi Yang ◽  
Xizu Wang ◽  
Bo Wu ◽  
Furong Zhu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Transient Photocurrent ◽  
Electron Collection
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