Prolongation of the singlet exciton lifetime of nonfullerene acceptor films by the replacement of the central benzene core with naphthalene

2021 ◽  
Author(s):  
Tomokazu Umeyama ◽  
Kensho Igarashi ◽  
Yasunari Tamai ◽  
Tatsuho Wada ◽  
Taiki Takeyama ◽  
...  
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Central Core ◽  
Singlet Exciton ◽  
Exciton Lifetime ◽  
Higher Power ◽  
Nonfullerene Acceptor

The replacement of benzene with naphthalene in the central core of an acceptor achieved a longer singlet lifetime and a higher power conversion efficiency.

Effect of the π-linker on the performance of organic photovoltaic devices based on push–pull D–π–A molecules

2018 ◽  
Vol 42 (14) ◽  
pp. 11458-11464 ◽  
Author(s):  
Hong Chul Lim ◽  
Jang-Joo Kim ◽  
Jyongsik Jang ◽  
Jong-In Hong
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Organic Photovoltaic ◽  
Photovoltaic Devices ◽  
Organic Photovoltaic Devices ◽  
Higher Power

The bulk heterojunction organic photovoltaic (OPV) devices based on 3T : PC71BM (2 wt%, 1 : 1.75 w/w) exhibited a higher power conversion efficiency of 2.58% than DTT-based OPV devices.

scholarly journals The role of connectivity in significant bandgap narrowing for fused-pyrene based non-fullerene acceptors toward high-efficiency organic solar cells

2020 ◽  
Vol 8 (12) ◽  
pp. 5995-6003 ◽  
Author(s):  
Shungang Liu ◽  
Wenyan Su ◽  
Xianshao Zou ◽  
Xiaoyan Du ◽  
Jiamin Cao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Power Conversion ◽  
Structural Isomer ◽  
Bandgap Narrowing ◽  
Higher Power

Isomers of non-fullerene acceptors with pyrene as cores but fused at different positions were studied. FPIC6 possessed ∼119 nm of red-shift absorption and much higher power conversion efficiency of 11.55% as compared to its structural isomer FPIC5.

Chlorine-doped SnO2 hydrophobic surfaces for large grain perovskite solar cells

2020 ◽  
Vol 8 (33) ◽  
pp. 11638-11646 ◽  
Author(s):  
Wenxiao Gong ◽  
Heng Guo ◽  
Haiyan Zhang ◽  
Jian Yang ◽  
Haiyuan Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Tin Oxide ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Higher Power

Both wetting and non-wetting tin oxide SnO2 were spin-coated and the non-wetting electron transport layer demonstrated a larger perovskite and higher power conversion efficiency.

Dye-sensitized solar cells based a new type of nonvolatile Co(II)/Co(III) electrolyte delivering higher power conversion efficiency for indoor applications.

2021 ◽  
Vol 13 ◽  
Author(s):  
Soorya Sasi ◽  
Arya Sajeev ◽  
Sunish K. Sugunan ◽  
Pankajakshan Radhakrishnan Nair ◽  
Suresh Mathew
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Open Circuit Voltage ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Higher Power ◽  
New Type ◽  
High Concentrations

Background: Electrolyte is an essential constituent of a dye-sensitized solar cell (DSSC) as it mediates charge transport and regeneration of the oxidized dye. Iodide/triiodide (I- /I3-) based electrolytes are the ones widely being used in DSSCs. These types of electrolytes are usually made by dissolving high concentrations of triiodide and polyiodide species in solvents such as acetonitrile or methoxypropionitrile. These solvents face evaporation issues and lead to stability problems, thus reduce the life span of the DSSC. For solving these issues, various types of electrolytes such as ionic liquids, and gelated liquid electrolytes have been used to replace the conventional volatile electrolytes. Objective: To solve the solvent evaporation issue and increase in electric resistance, we aim to synthesis a nonvolatile electrolyte with excellent open-circuit voltage and stability. Method: A new genre of nonvolatile Co(II)/Co(III) redox electrolyte was synthesized by the reaction of tris(2-(1H-pyrazol-1-yl)pyridine)cobalt(II) and tris(2-(1H-pyrazol-1-yl)pyridine) cobalt(III) with 2,4,6-tris(dodecyloxy)benzaldehyde. As a proof-of-principle experiment, a DSSC was fabricated using the as-synthesized electrolyte, N-719 dye as the light harvester, and TiO2 as the photoanode and their performances were analyzed in room light conditions. Results: The DSSCs deliver a remarkable power conversion efficiency of 22.1%, an open circuit voltage of 1 V and a power output of 88.5 μW cm–2 at 1000 lux, under illumination from a deltron LED light. Conclusion: Cobalt based non-volatile electrolytes are efficient candidates that can replace the conventional volatile electrolytes in DSSCs. Further research into this new type of electrolyte could pave ways to deliver high open circuit voltage as well as good current density with high stability.

A 9.16% Power Conversion Efficiency Organic Solar Cell with a Porphyrin Conjugated Polymer Using a Nonfullerene Acceptor

2019 ◽  
Vol 11 (31) ◽  
pp. 28078-28087 ◽  
Author(s):  
Loïc Tanguy ◽  
Prateek Malhotra ◽  
Surya Prakash Singh ◽  
Gessie Brisard ◽  
Ganesh D. Sharma ◽  
...  
Keyword(s):  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Conjugated Polymer ◽  
Organic Solar Cell ◽  
Power Conversion ◽  
Nonfullerene Acceptor

As-cast ternary polymer solar cells based on a nonfullerene acceptor and its fluorinated counterpart showing improved efficiency and good thickness tolerance

2019 ◽  
Vol 7 (16) ◽  
pp. 9798-9806 ◽  
Author(s):  
Feilong Pan ◽  
Lianjie Zhang ◽  
Haiying Jiang ◽  
Dong Yuan ◽  
Yaowen Nian ◽  
...  
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Polymer Solar Cells ◽  
Power Conversion ◽  
Ternary Blend ◽  
Blend Films ◽  
Thickness Tolerance ◽  
Ternary Polymer ◽  
Nonfullerene Acceptor

PBDB-T-SF : IDIC : ID4F ternary blend films show 11.52% power conversion efficiency, higher than 9.39% and 10.35% for the corresponding binary devices.

scholarly journals The effect of branched versus linear alkyl side chains on the bulk heterojunction photovoltaic performance of small molecules containing both benzodithiophene and thienopyrroledione

2014 ◽  
Vol 16 (37) ◽  
pp. 19874-19883 ◽  
Author(s):  
Yu Jin Kim ◽  
Kwang Hun Park ◽  
Jong-jin Ha ◽  
Dae Sung Chung ◽  
Yun-Hi Kim ◽  
...  
Keyword(s):  
Small Molecules ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Light Absorption ◽  
Bulk Heterojunction ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Side Chains ◽  
Higher Power ◽  
Alkyl Side Chains

Compared toBDTO-TTPD,BDTEH-TTPDshowed stronger light absorption and longer-range ordering, which results in higher power conversion efficiency.

Enhancing the photovoltaic performance of heteroheptacene-based nonfullerene acceptors through the synergistic effect of side-chain engineering and fluorination

2020 ◽  
Vol 8 (46) ◽  
pp. 24543-24552
Author(s):  
Dongdong Cai ◽  
Jianqi Zhang ◽  
Jin-Yun Wang ◽  
Yunlong Ma ◽  
Shuo Wan ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Photovoltaic Performance ◽  
Side Chain ◽  
End Group ◽  
Nonfullerene Acceptor

The synergistic effect of end-group fluorination and side-chain engineering leads to a nonfullerene acceptor with an outstanding power conversion efficiency of 14.75%.

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