Influence of Intermixed Donor and Acceptor Domains on the Ultrafast Charge Generation in Bulk Heterojunction Materials

2015 ◽  
Vol 119 (48) ◽  
pp. 26889-26894 ◽  
Author(s):  
Chengmei Zhong ◽  
Jonathan A. Bartelt ◽  
Michael D. McGehee ◽  
Derong Cao ◽  
Fei Huang ◽  
...  
Keyword(s):  
Bulk Heterojunction ◽  
Charge Generation ◽  
Donor And Acceptor

scholarly journals Barrierless Free Charge Generation in the High‐Performance PM6:Y6 Bulk Heterojunction Non‐Fullerene Solar Cell

2020 ◽  
Vol 32 (9) ◽  
pp. 1906763 ◽  
Author(s):  
Lorena Perdigón‐Toro ◽  
Huotian Zhang ◽  
Anastasia Markina ◽  
Jun Yuan ◽  
Seyed Mehrdad Hosseini ◽  
...  
Keyword(s):  
Solar Cell ◽  
High Performance ◽  
Bulk Heterojunction ◽  
Free Charge ◽  
Charge Generation

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.

scholarly journals The Role of Photon Energy in Free Charge Generation in Bulk Heterojunction Solar Cells

2014 ◽  
Vol 4 (18) ◽  
pp. 1400416 ◽  
Author(s):  
Daniele Di Nuzzo ◽  
L. Jan Anton Koster ◽  
Veronique S. Gevaerts ◽  
Stefan C. J. Meskers ◽  
René A. J. Janssen
Keyword(s):  
Solar Cells ◽  
Photon Energy ◽  
Bulk Heterojunction ◽  
Free Charge ◽  
Charge Generation ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

Nanometer-Scaled Landscape of Polymer:Fullerene Blends Mapped with Visible s-SNOM

2021 ◽  
Author(s):  
Ya-Rong Lee ◽  
Cheng-Chia Huang ◽  
Wen-Yu Huang ◽  
Chin-Ti Chen ◽  
Ping-Tsung Huang ◽  
...  
Keyword(s):  
Active Layer ◽  
Organic Solar Cells ◽  
Charge Separation ◽  
High Performance ◽  
Bulk Heterojunction ◽  
Near Field ◽  
Photovoltaic Performance ◽  
Energy Landscapes ◽  
Donor And Acceptor ◽  
Shed Light

Abstract Bulk heterojunction is one key concept leading to breakthrough in organic photovoltaics. The active layer is expectantly formed of distinct morphologies that carry out their respective roles in photovoltaic performance. The morphology-performance relationship however remains stymied, because unequivocal morphology at the nanoscale is not available. We used scattering-type scanning near-field optical microscopy operating with a visible light source (visible s-SNOM) to disclose the nanomorphology of P3HT:PCBM and pBCN:PCBM blends. Donor and acceptor domain as well as intermixed phase were identified and their intertwined distributions were mapped. We proposed energy landscapes of the BHJ active layer to shed light on the roles played by these morphologies in charge separation, transport and recombination. This study shows that visible s-SNOM is capable of profiling the morphological backdrop pertaining to the operation of high performance organic solar cells.

Light harvesting enhancement upon incorporating alloy structured CdSeXTe1−X quantum dots in DPP:PC61BM bulk heterojunction solar cells

2017 ◽  
Vol 5 (3) ◽  
pp. 654-662 ◽  
Author(s):  
Rezvan Soltani ◽  
Ali Asghar Katbab ◽  
Kerstin Schaumberger ◽  
Nicola Gasparini ◽  
Christoph J. Brabec ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Light Harvesting ◽  
Bulk Heterojunction ◽  
Charge Generation ◽  
Heterojunction Solar Cells ◽  
Bulk Heterojunction Solar Cells

PCE is improved owing to the enhanced JSC, resulting from larger light harvesting and higher charge generation.

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