Role of the Au and Ag nanoparticles on organic solar cells based on P3HT:PCBM active layer

To facilitate the device optimization of organic solar cells, a conjugated macrocycle namely cyanostar is firstly utilized to simultaneously modify the active layer and hole transporting layer. Benefiting from the...

Download Full-text

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

Journal of Materials Chemistry A ◽

10.1039/d1ta08893a ◽

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...

Download Full-text

Vertically Optimized Phase Separation with Improved Exciton Diffusion Enables High-Efficiency Organic Solar Cells with Thick Active Layers

10.21203/rs.3.rs-952325/v1 ◽

2021 ◽

Author(s):

Yanming Sun ◽

Yunhao Cai ◽

Qian Li ◽

Guanyu Lu ◽

Hwa Sook Ryu ◽

...

Keyword(s):

Solar Cells ◽

Phase Separation ◽

Active Layer ◽

Organic Solar Cells ◽

High Efficiency ◽

Diffusion Length ◽

Active Layer Thickness ◽

Exciton Diffusion ◽

Exciton Diffusion Length ◽

Active Layers

Abstract The development of high-performance organic solar cells (OSCs) with thick active layers is of crucial importance for the roll-to-roll printing of large-area solar panels. Unfortunately, increasing the active layer thickness usually results in a significant reduction in efficiency. Herein, we fabricated efficient thick-film OSCs with an active layer consisting of one polymer donor and two non-fullerene acceptors. The two acceptors were found to possess enlarged exciton diffusion length in the mixed phase, which is beneficial to exciton generation and dissociation. Additionally, layer by layer approach was employed to optimize the vertical phase separation. Benefiting from the synergetic effects of enlarged exciton diffusion length and graded vertical phase separation, a record high efficiency of 17.31% (certified value of 16.9%) was obtained for the 300 nm-thick OSC, with an unprecedented short-circuit current density of 28.36 mA cm−2, and a high fill factor of 73.0%. Moreover, the device with an active layer thickness of 500 nm also shows a record efficiency of 15.21%. This work provides new insights into the fabrication of high-efficiency OSCs with thick active layers.

Download Full-text

Active layer thickness effect on the recombination process of PCDTBT:PC71BM organic solar cells

Organic Electronics ◽

10.1016/j.orgel.2012.10.025 ◽

2013 ◽

Vol 14 (1) ◽

pp. 74-79 ◽

Cited By ~ 45

Author(s):

Gon Namkoong ◽

Jaemin Kong ◽

Matthew Samson ◽

In-Wook Hwang ◽

Kwanghee Lee

Keyword(s):

Solar Cells ◽

Layer Thickness ◽

Active Layer ◽

Organic Solar Cells ◽

Recombination Process ◽

Thickness Effect ◽

Active Layer Thickness

Download Full-text

Effects of Ag Nanocubes with Different Corner Shape on the Absorption Enhancement in Organic Solar Cells

Journal of Nanomaterials ◽

10.1155/2014/827658 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

Feng Shan ◽

Tong Zhang ◽

Sheng-Qing Zhu

Keyword(s):

Solar Cells ◽

Active Layer ◽

Organic Solar Cells ◽

Field Enhancement ◽

Localized Surface Plasmon ◽

Absorption Enhancement ◽

Absorption Performance ◽

Different Shapes ◽

Ag Ncs ◽

Metallic Region

The effects of corner shape of silver (Ag) nanocubes (NCs) on optical absorptions of organic solar cells (OSCs) are theoretically investigated by finite element method (FEM) calculations. The absorption of sun light in the active layer is calculated. Significant absorption enhancements have been demonstrated in metallic region with different shapes of Ag NCs, among them corner radius (R) is zero result in the best light absorption performance of up to 55% enhancement with respect to bare OSCs. The origins of increased absorption are believed to be the effects of the huge electric field enhancement and increased scattering upon the excitation of localized surface plasmon resonance (LSPR). Apart from usingR=0, we show thatR=3, 6, and 11.29 of Ag NCs in metallic region of active layer may also result in the maximum comparable absorption enhancement of 49%, 41%, and 28%, respectively. In addition, a significant effect of the period of NCs is observed.

Download Full-text

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

10.20944/preprints201911.0352.v1 ◽

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.

Download Full-text