scholarly journals Exploring Deep and Shallow Trap States in a Non-Fullerene Acceptor ITIC-Based Organic Bulk Heterojunction Photovoltaic System

2019 ◽  
Vol 123 (34) ◽  
pp. 20691-20697 ◽  
Author(s):  
Xixiang Zhu ◽  
Kai Wang ◽  
Jiaqi He ◽  
Lu Zhang ◽  
Haomiao Yu ◽  
...  
Keyword(s):  
Bulk Heterojunction ◽  
Photovoltaic System ◽  
Trap States ◽  
Shallow Trap

Modeling the Effect of Annealing and Regioregularity on Electron and Hole Transport Characteristics of Bulk Heterojunction Organic Photovoltaic Devices

2010 ◽  
Vol 1270 ◽  
Author(s):  
Shabnam Shambayati ◽  
Bobak Gholamkhass ◽  
Soheil Ebadian ◽  
Steven Holdcroft ◽  
Peyman Servati
Keyword(s):  
Annealing Time ◽  
Electron Mobility ◽  
Bulk Heterojunction ◽  
Acid Methyl Ester ◽  
Hole Mobility ◽  
Phase Segregation ◽  
Hole Transport ◽  
Trap States ◽  
Current Voltage ◽  
Steep Decline

AbstractIn this study, the dark current-voltage characteristics of electron-only and hole-only poly(3-hexyl thiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) as a function of regioregularity (RR) and annealing time is investigated using the mobility edge (ME) model. This model is used to analyze the degradation of electron and hole mobilities as a function of annealing time for 93%-RR and 98%-RR P3HT:PCBM devices. The hole mobility is almost unchanged by the RR nature of P3HT and thermal annealing. The electron mobility, however, behaves differently after annealing. The electron mobility of 98%-RR devices, which is initially higher than that of the 93%-RR devices, experiences a steep decline with annealing. Based on ME analysis, this is due to an increase in trap states in the exponential tail caused by phase segregation of solid state blends of 98%-RR polymer and PCBM. The electron mobility of 93%-RR devices increases with annealing due to an optimization of nano-phase separated morphology.

scholarly journals All-small-molecule organic solar cells with over 14% efficiency by optimizing hierarchical morphologies

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Ruimin Zhou ◽  
Zhaoyan Jiang ◽  
Chen Yang ◽  
Jianwei Yu ◽  
Jirui Feng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
High Performance ◽  
High Efficiency ◽  
Bulk Heterojunction ◽  
Photovoltaic Performance ◽  
Photovoltaic System ◽  
Active Layers ◽  
Donor Acceptor

AbstractThe high efficiency all-small-molecule organic solar cells (OSCs) normally require optimized morphology in their bulk heterojunction active layers. Herein, a small-molecule donor is designed and synthesized, and single-crystal structural analyses reveal its explicit molecular planarity and compact intermolecular packing. A promising narrow bandgap small-molecule with absorption edge of more than 930 nm along with our home-designed small molecule is selected as electron acceptors. To the best of our knowledge, the binary all-small-molecule OSCs achieve the highest efficiency of 14.34% by optimizing their hierarchical morphologies, in which the donor or acceptor rich domains with size up to ca. 70 nm, and the donor crystals of tens of nanometers, together with the donor-acceptor blending, are proved coexisting in the hierarchical large domain. All-small-molecule photovoltaic system shows its promising for high performance OSCs, and our study is likely to lead to insights in relations between bulk heterojunction structure and photovoltaic performance.

scholarly journals Direct Observation of Shallow Trap States in Thermal Equilibrium with Band‐Edge Excitons in Strongly Confined CsPbBr 3 Perovskite Nanoplatelets

2020 ◽  
Vol 9 (1) ◽  
pp. 2001308
Author(s):  
Etienne Socie ◽  
Brener R. C. Vale ◽  
Andrés Burgos‐Caminal ◽  
Jacques‐E. Moser
Keyword(s):  
Direct Observation ◽  
Thermal Equilibrium ◽  
Band Edge ◽  
Trap States ◽  
Shallow Trap

P3HT/ZnS: A new hybrid bulk heterojunction photovoltaic system with very high open circuit voltage

2009 ◽  
Vol 93 (5) ◽  
pp. 662-666 ◽  
Author(s):  
Michael Bredol ◽  
Katarzyna Matras ◽  
Adam Szatkowski ◽  
Jerzy Sanetra ◽  
Anna Prodi-Schwab
Keyword(s):  
Open Circuit Voltage ◽  
Bulk Heterojunction ◽  
Open Circuit ◽  
Photovoltaic System ◽  
Very High

scholarly journals Correction to “Insight on Shallow Trap States-Introduced Photocathodic Performance in n-Type Polymer Photocatalysts”

2020 ◽  
Vol 142 (42) ◽  
pp. 18277-18278 ◽  
Author(s):  
Qiushi Ruan ◽  
Tina Miao ◽  
Hui Wang ◽  
Junwang Tang
Keyword(s):  
Trap States ◽  
Shallow Trap

Shallow trap states in pentacene thin films from molecular sliding

2005 ◽  
Vol 86 (15) ◽  
pp. 152115 ◽  
Author(s):  
Joo H. Kang ◽  
Demetrio da Silva Filho ◽  
Jean-Luc Bredas ◽  
X.-Y. Zhu
Keyword(s):  
Thin Films ◽  
Trap States ◽  
Shallow Trap
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