A 9,9′-bifluorenylidene derivative containing four 1,1-dicyanomethylene-3-indanone end-capped groups as an electron acceptor for organic photovoltaic cells

2019 ◽  
Vol 43 (46) ◽  
pp. 18110-18119 ◽  
Author(s):  
Tianzhi Yu ◽  
Qianguang Yang ◽  
Tong Zhang ◽  
Yuling Zhao ◽  
Chengjin Wei ◽  
...  
Keyword(s):  
Electron Acceptor ◽  
Photovoltaic Cells ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells

A non-fullerene receptor (BF-TDCI4) was successfully synthesized for organic photovoltaic cells, and the PCE of the device was 4.35%.

COMPARISON OF PERFORMANCES OF ORGANIC PHOTOVOLTAIC CELLS USING SubPc AS CENTRAL AMBIPOLAR LAYER IN TERNARY STRUCTURES AND AS ELECTRON ACCEPTOR IN BINARY STRUCTURES

2019 ◽  
Vol 27 (07) ◽  
pp. 1950184
Author(s):  
M. B. SIAD ◽  
Z. EL JOUAD ◽  
A. KHELIL ◽  
A. MOHAMMED KRARROUBI ◽  
S. MORSLI ◽  
...  
Keyword(s):  
Electron Acceptor ◽  
Collection Efficiency ◽  
Photovoltaic Cells ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Maximum Efficiency ◽  
Organic Layer ◽  
Organic Photovoltaic Cells ◽  
Charge Collection Efficiency ◽  
Efficiency Increase

We compare the performances of organic photovoltaic cells (OPVCs) based on binary and ternary planar heterojunctions. The organic active layers are pentathiophene (5T), subphthalocyanine (SubPc) and fullerene (C60). SubPc being an ambipolar material we used it either as electron acceptor in binary OPVCs or as central layer in ternary cells in order to increase the efficiency of OPVCs using 5T as electron donor. So, the different OPVC configurations were 5T/C60, 5T/SubPc and 5T/SubPc/C60. The effect of the different organic layer thicknesses on the device performances was studied. In order to understand the behavior of the different OPVC configurations, we proceeded with a morphological study. The influence of the high roughness of the 5T layer on the OPVCs performances is discussed. The best OPVCs performances are obtained with the binary structure 5T/SubPc. Its maximum efficiency corresponds to an increase of 50% compared to the OPVC based on the couple 5T/C60. External Quantum Efficiency measurements show that both layers participate to the current generation. The efficiency increase is mainly due to the increase of the open circuit voltage ([Formula: see text]). In the case of ternary OPVCs, [Formula: see text] is limited by the band structure of 5T and C60, moreover, the efficiency is also limited by the poor charge collection efficiency of the ternary structure and the series resistance of the three stacked organic layers.

Organic photovoltaic cells using hexadecafluorophthalocyaninatocopper (F16CuPc) as electron acceptor material

2007 ◽  
Vol 446 (4-6) ◽  
pp. 329-332 ◽  
Author(s):  
Xiaoxia Jiang ◽  
Jiguang Dai ◽  
Haibo Wang ◽  
Yanhou Geng ◽  
DongHang Yan
Keyword(s):  
Electron Acceptor ◽  
Photovoltaic Cells ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells

scholarly journals Open circuit voltage of organic photovoltaic cells using C60 as acceptor: variation with the donor

2019 ◽  
Vol 86 (2) ◽  
pp. 20201 ◽  
Author(s):  
Zouhair El Jouad ◽  
Linda Cattin ◽  
Mohammed Addou ◽  
Jean Christian Bernède
Keyword(s):  
Molecular Orbital ◽  
Electron Acceptor ◽  
Open Circuit Voltage ◽  
Photovoltaic Cells ◽  
Energy Difference ◽  
Open Circuit ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells ◽  
Highest Occupied Molecular Orbital ◽  
Lowest Unoccupied Molecular Orbital

The open circuit voltage (Voc) of organic photovoltaic cells (OPVs) is an important parameter in terms of OPV performance. In the present work, we check that its value depends on the energy difference between the Lowest Unoccupied Molecular Orbital of the electron acceptor (LUMOA) and the Highest Occupied Molecular Orbital of the donor (HOMOD). The electron acceptor is the fullerene, while the electron acceptors are used as parameter. The results show that Voc increases with the value of Δ(LUMOA–HOMOD). However, for some molecules, this increase is not linear, which shows that other parameters are also determinant.

Synthesis and photophysical properties of 2,2′-bis(oligothiophene)-9,9′-bifluorenylidene derivatives

2018 ◽  
Vol 42 (3) ◽  
pp. 2094-2103 ◽  
Author(s):  
Tianzhi Yu ◽  
Weijia Guan ◽  
Xin Wang ◽  
Yuling Zhao ◽  
Qianguang Yang ◽  
...  
Keyword(s):  
Electron Acceptor ◽  
Photophysical Properties ◽  
Photovoltaic Cells ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells

Herein, three 9,9′-bifluorenylidene derivatives were synthesized, among which STBF could be used as an electron acceptor in P3HT-based organic photovoltaic cells.

scholarly journals Organic Photovoltaic Cells Based on PbPc Nanocolumns Prepared by Glancing Angle Deposition

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Yang Liu ◽  
Fujun Zhang ◽  
Jian Wang
Keyword(s):  
Electron Donor ◽  
Electron Acceptor ◽  
Photovoltaic Cells ◽  
Glancing Angle Deposition ◽  
Illumination Intensity ◽  
Organic Photovoltaic ◽  
Organic Photovoltaic Cells ◽  
Donor And Acceptor ◽  
Glancing Angle ◽  
Angle Deposition

Organic small material lead phthalocyanine (PbPc) nanocolumns were prepared via glancing angle deposition (GLAD) on indium tin oxide (ITO) coated glass substrates. Organic electron acceptor materials fullerene (C60) was evaporated onto the nanocolumn PbPc thin films to prepare heterojunction structure ITO/PbPc/C60/Bphen/Al organic photovoltaic cells (OPVs). It is worthwhile to mention that C60molecules firstly fill the voids between PbPc nanocolumns and then form impact C60layer. The interpenetrating electron donor/acceptor structure effectively enhances interface between electron donor and electron acceptor, which is beneficial to exciton dissociation. The short circuit current density (Jsc) of organic photovoltaic devices (OPVs) based on PbPc nanocolumn was increased from 1.19 mA/cm2to 1.74 mA/cm2, which should be attributed to the increase of interface between donor and acceptor. The effect of illumination intensity on the performance of OPVs was investigated by controlling the distance between light source and sample, and theJscof two kind of OPVs was increased along with the increase of illumination intensity.

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