Benzothiadiazole-triphenylamine as an efficient exciton blocking layer in small molecule based organic solar cells

Laura Caliò, Bhushan R. Patil, Johannes Benduhn, Koen Vandewal, Horst Günter Rubahn, Morten Madsen, Samrana Kazim*, Shahzada Ahmad

*Kontaktforfatter for dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We have designed a small molecule based on benzothiadiazole-triphenylamine moieties (BTD-TPA2), composed of an electron-poor benzothiadiazole core with two electron-rich triphenylamine arms. BTD-TPA2 was synthesized in a facile manner using a Suzuki cross-coupling reaction. The molecule was rationally designed to take advantage of the synergistic effect of BTD, which allows the formation of a favorable band gap material, and triphenylamine (TPA) moieties, which favour efficient hole extraction and transport properties. A thin layer of BTD-TPA2 was placed between the photo-active DBP/C70 layer stack and the MoOx electrical contact. With an optimized interlayer thickness of 35 nm, the attained photovoltaic properties were substantially superior to those of the reference devices. This has its origin in the dual functionality of BTD-TPA2, i.e., efficient exciton blocking and improved hole extraction at the anode contact. The obtained results led to an improved power conversion efficiency of 5.66% for a vacuum deposited bilayer DBP/C70 solar cell, which will be the new state of the art for bilayer DBP based solar cells.

OriginalsprogEngelsk
TidsskriftSustainable Energy and Fuels
Vol/bind2
Udgave nummer10
Sider (fra-til)2296-2302
ISSN2398-4902
DOI
StatusUdgivet - aug. 2018

Fingeraftryk

Solar cells
Molecules
Electrons
Transport properties
Conversion efficiency
Anodes
Energy gap
Vacuum
LDS 751
Organic solar cells
benzo-1,2,3-thiadiazole

Citer dette

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title = "Benzothiadiazole-triphenylamine as an efficient exciton blocking layer in small molecule based organic solar cells",
abstract = "We have designed a small molecule based on benzothiadiazole-triphenylamine moieties (BTD-TPA2), composed of an electron-poor benzothiadiazole core with two electron-rich triphenylamine arms. BTD-TPA2 was synthesized in a facile manner using a Suzuki cross-coupling reaction. The molecule was rationally designed to take advantage of the synergistic effect of BTD, which allows the formation of a favorable band gap material, and triphenylamine (TPA) moieties, which favour efficient hole extraction and transport properties. A thin layer of BTD-TPA2 was placed between the photo-active DBP/C70 layer stack and the MoOx electrical contact. With an optimized interlayer thickness of 35 nm, the attained photovoltaic properties were substantially superior to those of the reference devices. This has its origin in the dual functionality of BTD-TPA2, i.e., efficient exciton blocking and improved hole extraction at the anode contact. The obtained results led to an improved power conversion efficiency of 5.66{\%} for a vacuum deposited bilayer DBP/C70 solar cell, which will be the new state of the art for bilayer DBP based solar cells.",
author = "Laura Cali{\`o} and Patil, {Bhushan R.} and Johannes Benduhn and Koen Vandewal and Rubahn, {Horst G{\"u}nter} and Morten Madsen and Samrana Kazim and Shahzada Ahmad",
year = "2018",
month = "8",
doi = "10.1039/c8se00251g",
language = "English",
volume = "2",
pages = "2296--2302",
journal = "Sustainable Energy & Fuels",
issn = "2398-4902",
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Benzothiadiazole-triphenylamine as an efficient exciton blocking layer in small molecule based organic solar cells. / Caliò, Laura; Patil, Bhushan R.; Benduhn, Johannes; Vandewal, Koen; Rubahn, Horst Günter; Madsen, Morten; Kazim, Samrana; Ahmad, Shahzada.

I: Sustainable Energy and Fuels, Bind 2, Nr. 10, 08.2018, s. 2296-2302.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Benzothiadiazole-triphenylamine as an efficient exciton blocking layer in small molecule based organic solar cells

AU - Caliò, Laura

AU - Patil, Bhushan R.

AU - Benduhn, Johannes

AU - Vandewal, Koen

AU - Rubahn, Horst Günter

AU - Madsen, Morten

AU - Kazim, Samrana

AU - Ahmad, Shahzada

PY - 2018/8

Y1 - 2018/8

N2 - We have designed a small molecule based on benzothiadiazole-triphenylamine moieties (BTD-TPA2), composed of an electron-poor benzothiadiazole core with two electron-rich triphenylamine arms. BTD-TPA2 was synthesized in a facile manner using a Suzuki cross-coupling reaction. The molecule was rationally designed to take advantage of the synergistic effect of BTD, which allows the formation of a favorable band gap material, and triphenylamine (TPA) moieties, which favour efficient hole extraction and transport properties. A thin layer of BTD-TPA2 was placed between the photo-active DBP/C70 layer stack and the MoOx electrical contact. With an optimized interlayer thickness of 35 nm, the attained photovoltaic properties were substantially superior to those of the reference devices. This has its origin in the dual functionality of BTD-TPA2, i.e., efficient exciton blocking and improved hole extraction at the anode contact. The obtained results led to an improved power conversion efficiency of 5.66% for a vacuum deposited bilayer DBP/C70 solar cell, which will be the new state of the art for bilayer DBP based solar cells.

AB - We have designed a small molecule based on benzothiadiazole-triphenylamine moieties (BTD-TPA2), composed of an electron-poor benzothiadiazole core with two electron-rich triphenylamine arms. BTD-TPA2 was synthesized in a facile manner using a Suzuki cross-coupling reaction. The molecule was rationally designed to take advantage of the synergistic effect of BTD, which allows the formation of a favorable band gap material, and triphenylamine (TPA) moieties, which favour efficient hole extraction and transport properties. A thin layer of BTD-TPA2 was placed between the photo-active DBP/C70 layer stack and the MoOx electrical contact. With an optimized interlayer thickness of 35 nm, the attained photovoltaic properties were substantially superior to those of the reference devices. This has its origin in the dual functionality of BTD-TPA2, i.e., efficient exciton blocking and improved hole extraction at the anode contact. The obtained results led to an improved power conversion efficiency of 5.66% for a vacuum deposited bilayer DBP/C70 solar cell, which will be the new state of the art for bilayer DBP based solar cells.

U2 - 10.1039/c8se00251g

DO - 10.1039/c8se00251g

M3 - Journal article

VL - 2

SP - 2296

EP - 2302

JO - Sustainable Energy & Fuels

JF - Sustainable Energy & Fuels

SN - 2398-4902

IS - 10

ER -