Nanosecond response of organic solar cells and photodiodes: Role of trap states

2011 ◽  
Vol 83 (19) ◽  
Author(s):  
Nico Christ ◽  
Siegfried W. Kettlitz ◽  
Simon Züfle ◽  
Sebastian Valouch ◽  
Uli Lemmer
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Trap States

Capacitance Spectroscopy of Light Induced Trap States in Organic Solar Cells

2016 ◽  
Vol 120 (39) ◽  
pp. 22169-22178 ◽  
Author(s):  
Robert A. Street ◽  
Yang Yang ◽  
Barry C. Thompson ◽  
Iain McCulloch
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Trap States ◽  
Capacitance Spectroscopy

Revealing the role of solvent additives on morphology and energy loss in benzodifuran polymer based non-fullerene organic solar cells

2021 ◽  
Author(s):  
Zhi Zheng ◽  
Enfang He ◽  
Jie Wang ◽  
Zhaotong Qin ◽  
Tianqi Niu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Energy Loss ◽  
Organic Solar Cells ◽  
Opposite Effect ◽  
Effective Strategy ◽  
Highly Efficient ◽  
Solvent Additive ◽  
Role Of Solvent

Solvent additive (SA) treatment is the most effective strategy to obtain highly efficient non-fullerene organic solar cells (NF-OSCs). However, NF-OSCs with SA treatment usually exhibits different or even opposite effect...

scholarly journals Emphasizing the Operational Role of a Novel Graphene-Based Ink into High Performance Ternary Organic Solar Cells

2019 ◽  
Author(s):  
Minas M. Stylianakis ◽  
Dimitriοs M. Kosmidis ◽  
Katerina Anagnostou ◽  
Christos Polyzoidis ◽  
Miron Krassas ◽  
...  
Keyword(s):  
Solar Cells ◽  
Molecular Orbital ◽  
Organic Solar Cells ◽  
High Performance ◽  
Energy Levels ◽  
Fullerene Derivative ◽  
Highest Occupied Molecular Orbital ◽  
Lowest Unoccupied Molecular Orbital ◽  
Synthetic Routes

A novel solution-processed graphene-based material was synthesized by treating graphene oxide (GO) with 2,5,7-trinitro-9-oxo-fluorenone-4-carboxylic acid (TNF-COOH) moieties, via simple synthetic routes. The yielded molecule N-[(carbamoyl-GO)ethyl]-N’-[(carbamoyl)-(2,5,7-trinitro-9-oxo-fluorene)] (GO-TNF) was thoroughly characterized and it was shown that it presents favorable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels to function as a bridge component between the polymeric donor poly({4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-b]thiophenediyl}) (PTB7) and the fullerene derivative acceptor [6,6]-phenyl-C71-butyric-acid-methylester (PC71BM). In this context, a GO-TNF based ink was prepared and directly incorporated within the binary photoactive layer, in different volume ratios (1-3% ratio to the blend), for the effective realization of inverted ternary organic solar cells (OSCs) of the structure ITO/PFN/PTB7:GO-TNF:PC71BM/MoO3/Al. The addition of 2% v/v GO-TNF ink led to a champion power conversion efficiency (PCE) of 8.71% that was enhanced by ~13% as compared to the reference cell.

Role of geminate polaron-pair recombination on magnetoconductance in P3HT and PC71BM bulk-heterojunction organic solar cells

2018 ◽  
Vol 63 ◽  
pp. 384-391 ◽  
Author(s):  
Se Jin Lee ◽  
Sang Bong Lee ◽  
Sung Cheol Yoon ◽  
Eun Young Choi ◽  
Choon Sup Yoon
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Bulk Heterojunction

Improved mechanical adhesion and electronic stability of organic solar cells with thermal ageing: the role of diffusion at the hole extraction interface

2017 ◽  
Vol 5 (6) ◽  
pp. 2911-2919 ◽  
Author(s):  
W. Greenbank ◽  
N. Rolston ◽  
E. Destouesse ◽  
G. Wantz ◽  
L. Hirsch ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Solar Cells ◽  
Organic Solar Cells ◽  
Thermal Ageing ◽  
Organic Photovoltaic ◽  
Mechanical Adhesion ◽  
Photovoltaic Solar Cells

Organic photovoltaic solar cells are a promising option for cheap, renewable energy, but must improve in their stability.

Ternary Organic Solar Cells: A Review of The Role of the Third Element☆

Nano Energy ◽  
2022 ◽  
pp. 106915
Author(s):  
Nutifafa Y. Doumon ◽  
Lili Yang ◽  
Federico Rosei
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
The Third

scholarly journals The role of dipole moment in two fused-ring electron acceptor and one polymer donor based ternary organic solar cells

2020 ◽  
Vol 4 (5) ◽  
pp. 1507-1518 ◽  
Author(s):  
Xunfan Liao ◽  
Yongjie Cui ◽  
Xueliang Shi ◽  
Zhaoyang Yao ◽  
Heng Zhao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dipole Moment ◽  
Electron Acceptor ◽  
Organic Solar Cells ◽  
Working Mechanism ◽  
Fused Ring

The dipole moment of FREAs’ terminals has been unveiled as an important factor and its working mechanism has been thoroughly investigated. Our results demonstrate that the dipole moment should also be taken into account in designing ternary OSCs.

Critical Role of Vertical Phase Separation in Small-Molecule Organic Solar Cells

2018 ◽  
Vol 10 (15) ◽  
pp. 12913-12920 ◽  
Author(s):  
Jin Fang ◽  
Dan Deng ◽  
Zaiyu Wang ◽  
Muhammad Abdullah Adil ◽  
Tong Xiao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Phase Separation ◽  
Small Molecule ◽  
Organic Solar Cells ◽  
Critical Role

scholarly journals Charge-generating mid-gap trap states define the thermodynamic limit of organic photovoltaic devices

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Nasim Zarrabi ◽  
Oskar J. Sandberg ◽  
Stefan Zeiske ◽  
Wei Li ◽  
Drew B. Riley ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Detailed Balance ◽  
Linear Process ◽  
Open Circuit ◽  
Trap States ◽  
Organic Photovoltaic Devices ◽  
Inorganic Semiconductors ◽  
Harvesting Systems ◽  
Gap States

AbstractDetailed balance is a cornerstone of our understanding of artificial light-harvesting systems. For next generation organic solar cells, this involves intermolecular charge-transfer (CT) states whose energies set the maximum open circuit voltage VOC. We have directly observed sub-gap states significantly lower in energy than the CT states in the external quantum efficiency spectra of a significant number of organic semiconductor blends. Taking these states into account and using the principle of reciprocity between emission and absorption results in non-physical radiative limits for the VOC. We propose and provide compelling evidence for these states being non-equilibrium mid-gap traps which contribute to photocurrent by a non-linear process of optical release, upconverting them to the CT state. This motivates the implementation of a two-diode model which is often used in emissive inorganic semiconductors. The model accurately describes the dark current, VOC and the long-debated ideality factor in organic solar cells. Additionally, the charge-generating mid-gap traps have important consequences for our current understanding of both solar cells and photodiodes – in the latter case defining a detectivity limit several orders of magnitude lower than previously thought.

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