Molecular engineering of the hole-transporting material spiro-OMeTAD via manipulation of alkyl groups

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60587-60594 ◽  
Author(s):  
D. Tomkute-Luksiene ◽  
M. Daskeviciene ◽  
T. Malinauskas ◽  
V. Jankauskas ◽  
R. Degutyte ◽  
...  
Keyword(s):  
Energy Levels ◽  
Substituent Effects ◽  
Molecular Engineering ◽  
Homo Energy ◽  
Molecular Glasses ◽  
Alkyl Groups ◽  
Hole Transporting ◽  
Aliphatic Substituent ◽  
Hole Transporting Material

Aliphatic substituent effects on the HOMO energy levels and the ability to transport charge and form stable molecular glasses of systematically modified spiro-OMeTAD analogues were investigated.

Stable perovskite solar cells with efficiency exceeding 24.8% and 0.3-V voltage loss

Science ◽  
2020 ◽  
Vol 369 (6511) ◽  
pp. 1615-1620 ◽  
Author(s):  
Mingyu Jeong ◽  
In Woo Choi ◽  
Eun Min Go ◽  
Yongjoon Cho ◽  
Minjin Kim ◽  
...  
Keyword(s):  
High Efficiency ◽  
Noncovalent Interactions ◽  
Energy Levels ◽  
Perovskite Solar Cells ◽  
Structure Property ◽  
Large Area ◽  
Long Term Stability ◽  
Voltage Loss ◽  
Hole Transporting ◽  
Hole Transporting Material

Further improvement and stabilization of perovskite solar cell (PSC) performance are essential to achieve the commercial viability of next-generation photovoltaics. Considering the benefits of fluorination to conjugated materials for energy levels, hydrophobicity, and noncovalent interactions, two fluorinated isomeric analogs of the well-known hole-transporting material (HTM) Spiro-OMeTAD are developed and used as HTMs in PSCs. The structure–property relationship induced by constitutional isomerism is investigated through experimental, atomistic, and theoretical analyses, and the fabricated PSCs feature high efficiency up to 24.82% (certified at 24.64% with 0.3-volt voltage loss), along with long-term stability in wet conditions without encapsulation (87% efficiency retention after 500 hours). We also achieve an efficiency of 22.31% in the large-area cell.

scholarly journals A partially-planarised hole-transporting quart-p-phenylene for perovskite solar cells

2019 ◽  
Vol 7 (15) ◽  
pp. 4332-4335
Author(s):  
Juan P. Mora-Fuentes ◽  
Diego Cortizo-Lacalle ◽  
Silvia Collavini ◽  
Karol Strutyński ◽  
Wolfgang R. Tress ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Energy Levels ◽  
Perovskite Solar Cells ◽  
Perovskite Solar Cell ◽  
Optimal Energy ◽  
Hole Transporting ◽  
Hole Transporting Material

Herein, we describe the synthesis of a hole transporting material based on a partially planarised quart-p-phenylene core incorporating tetraketal and diphenylamine substituents that show optimal energy levels and solubility for perovskite solar cell applications.

Both Luminous Efficiency and Lifetime Enhancement in Blue Fluorescence OLEDs by Modifying Molecular Structure of Hole Transporting Material

2011 ◽  
Vol 1286 ◽  
Author(s):  
Yoonhyun Kwak ◽  
Sun-Young Lee ◽  
Hye-In Jeong ◽  
Dae-Yup Shin ◽  
Young-Woo Song ◽  
...  
Keyword(s):  
Energy Levels ◽  
Luminous Efficiency ◽  
Coupling Reactions ◽  
Blue Fluorescence ◽  
Lumo Energy ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Hole Transporting ◽  
Palladium Catalyzed ◽  
Hole Transporting Material

ABSTRACTBoth luminous efficiency and lifetime in blue fluorescence organic light emitting devices (OLEDs) have been improved by modified HTMs with higher LUMO energy levels. The LUMO energy levels of HTM were increased by modifying substituent in HTM molecules. Two HTMs containing ortho and meta biphenyl substituent and one HTM containing thiophene substituent were synthesized via palladium catalyzed amine coupling reactions to compare with a para biphenyl substituent HTM-1 as a standard molecule. According to TDDFT calculations, these three modified HTMs showed 0.05-0.15 eV higher LUMO energy levels compared to the para biphenyl substituent HTM-1. The luminous efficiency and the lifetime (LT90) of OLEDs using HTM-2 at 500 cd/m2 have been enhanced up to 20 % and 52 %, respectively, compared to the standard device using HTM-1.

Molecular engineering of enamine-based small organic compounds as hole-transporting materials for perovskite solar cells

2019 ◽  
Vol 7 (9) ◽  
pp. 2717-2724 ◽  
Author(s):  
Maryte Daskeviciene ◽  
Sanghyun Paek ◽  
Artiom Magomedov ◽  
Kyoung Taek Cho ◽  
Michael Saliba ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Compounds ◽  
Perovskite Solar Cells ◽  
Molecular Engineering ◽  
Hole Transporting ◽  
Hole Transporting Material ◽  
Hole Transporting Materials

Optimization of the structure of hole transporting material leads to over 19% efficiency.

scholarly journals A Partially-Planarised Hole-Transporting Quart-p-Phenylene for Perovskite Solar Cells

2019 ◽  
Author(s):  
Juan P. Mora-Fuentes ◽  
Diego Cortizo-Lacalle ◽  
Silvia Collavini ◽  
Karol Strutyński ◽  
Wolfgang R. Tress ◽  
...  
Keyword(s):  
Short Circuit ◽  
Energy Levels ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Hole Transporting ◽  
Hole Transporting Material ◽  
Conversion Efficiencies ◽  
Open Circuit Voltages ◽  
Short Circuit Currents

<div><div><div><p>Herein, we describe the synthesis of a hole transporting material based on a partially planarised quart-p-phenylene core incorporating tetraketal and diphenylamine substituents that show optimal energy levels and solubility for perovskite solar cell applications. Triple-cation perovskite devices incorporating such quart-p-phenylene derivative show power-conversion efficiencies, short circuit currents, open circuit voltages, and fill factors that are comparable to those of spiro-OMeTAD.</p></div></div></div>

scholarly journals A Partially-Planarised Hole-Transporting Quart-p-Phenylene for Perovskite Solar Cells

2019 ◽  
Author(s):  
Juan P. Mora-Fuentes ◽  
Diego Cortizo-Lacalle ◽  
Silvia Collavini ◽  
Karol Strutyński ◽  
Wolfgang R. Tress ◽  
...  
Keyword(s):  
Short Circuit ◽  
Energy Levels ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Open Circuit ◽  
Hole Transporting ◽  
Hole Transporting Material ◽  
Conversion Efficiencies ◽  
Open Circuit Voltages ◽  
Short Circuit Currents

<div><div><div><p>Herein, we describe the synthesis of a hole transporting material based on a partially planarised quart-p-phenylene core incorporating tetraketal and diphenylamine substituents that show optimal energy levels and solubility for perovskite solar cell applications. Triple-cation perovskite devices incorporating such quart-p-phenylene derivative show power-conversion efficiencies, short circuit currents, open circuit voltages, and fill factors that are comparable to those of spiro-OMeTAD.</p></div></div></div>

scholarly journals Dopant-Free Triazatruxene-Based Hole Transporting Materials with Three Different End-Capped Acceptor Units for Perovskite Solar Cells

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 936
Author(s):  
Da Rim Kil ◽  
Chunyuan Lu ◽  
Jung-Min Ji ◽  
Chul Hoon Kim ◽  
Hwan Kyu Kim
Keyword(s):  
Solar Cells ◽  
Energy Levels ◽  
Photovoltaic Performance ◽  
Perovskite Solar Cells ◽  
Hole Mobility ◽  
Molecular Engineering ◽  
Structural Hole ◽  
Highest Occupied Molecular Orbital ◽  
Hole Transporting ◽  
Hole Transporting Materials

A series of dopant-free D-π-A structural hole-transporting materials (HTMs), named as SGT-460, SGT-461, and SGT-462, incorporating a planner-type triazatruxene (TAT) core, thieno[3,2-b]indole (TI) π-bridge and three different acceptors, 3-ethylthiazolidine-2,4-dione (ED), 3-(dicyano methylidene)indan-1-one (DI), and malononitrile (MN), were designed and synthesized for application in perovskite solar cells (PrSCs). The effect of three acceptor units in star-shaped D-π-A structured dopant-free HTMs on the photophysical and electrochemical properties and the photovoltaic performance were investigated compared to the reference HTM of 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9′-spirobifluorene (spiro-OMeTAD). Their highest occupied molecular orbital (HOMO) energy levels were positioned for efficient hole extraction from a MAPbCl3−xIx layer (5.43 eV). The hole mobility values of the HTMs without dopants were determined to be 7.59 × 10−5 cm2 V−1 s−1, 5.13 × 10−4 cm2 V−1 s−1, and 7.61 × 10−4 cm2 V−1 s−1 for SGT-460-, SGT-461-, and SGT-462-based films. The glass transition temperature of all HTMs showed higher than that of the spiro-OMeTAD. As a result, the molecular engineering of a planer donor core, π-bridge, and end-capped acceptor led to good hole mobility, yielding 11.76% efficiency from SGT-462-based PrSCs, and it provides a useful insight into the synthesis of the next-generation of HTMs for PrSC application.

A simple spiro-type hole transporting material for efficient perovskite solar cells

2015 ◽  
Vol 8 (7) ◽  
pp. 1986-1991 ◽  
Author(s):  
Paramaguru Ganesan ◽  
Kunwu Fu ◽  
Peng Gao ◽  
Ines Raabe ◽  
Kurt Schenk ◽  
...  
Keyword(s):  
Solar Cells ◽  
Molecular Level ◽  
Perovskite Solar Cells ◽  
Molecular Engineering ◽  
Hole Transporting ◽  
Hole Transporting Material

Spiro is beautiful. Two spiro-type molecules are compared at molecular levelviasingle-crystallography. Through molecular engineering, we synthesized new hole transporting material PST1 which works efficiently in perovskite solar cells without cobalt dopant.

Molecular engineering of face-on oriented dopant-free hole transporting material for perovskite solar cells with 19% PCE

2017 ◽  
Vol 5 (17) ◽  
pp. 7811-7815 ◽  
Author(s):  
Kasparas Rakstys ◽  
Sanghyun Paek ◽  
Peng Gao ◽  
Paul Gratia ◽  
Tomasz Marszalek ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transport ◽  
Perovskite Solar Cells ◽  
Molecular Engineering ◽  
Free Hole ◽  
Hole Transporting ◽  
Improved Stability ◽  
Hole Transporting Material

Dopant-free HTM KR321 showed highly ordered characteristic face-on organization leading to increased vertical charge transport and PCE over 19% in PSC with improved stability.

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