Efficient Spray‐Coated Colloidal Quantum Dot Solar Cells

Kramer, Illan J.; Minor, James C.; Moreno-Bautista, Gabriel; Rollny, Lisa R.; Kanjanaboos, Pongsakorn; Kopilovic, Damir; Thon, Susanna M.; Carey, Graham H.; Chou, Kang Wei; Zhitomirsky, David; Amassian, Aram; Sargent, Edward H.

doi:10.1002/adma.201403281

Cited by 147 publications

(135 citation statements)

References 36 publications

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“…In 2002, some of the device structures seen today for QDSCs were proposed [1]. Since then, different types of QDSCs have been investigated including p-i-n junction solar cells [2][3][4][5][6][7][8][9][10][11], quantum dot sensitized solar cells (QDSCs) [12][13][14][15][16], and QD-polymer solar cells [17]. State of the art PbS QDSCs achieves most of goals stated above with efficiencies currently around 11.3% [5].…”

Section: Introductionmentioning

confidence: 99%

Solution-Processed Environmentally Friendly Ag2S Colloidal Quantum Dot Solar Cells with Broad Spectral Absorption

et al. 2017

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A facile heat-up synthesis route is used to synthesize environmentally friendly Ag 2 S colloidal quantum dots (CQDs) that are applied as light absorbing material in solid state p-i-n junction solar cell devices. The as-synthesized Ag 2 S CQDs have an average size of around 3.5 nm and exhibit broad light absorption covering ultraviolet, visible, and near infrared wavelength regions. The solar cell devices are constructed with a device architecture of FTO/TiO 2 /Ag 2 S CQDs/hole transport material (HTM) /Au using a solution-processed approach. Different HTMs, N2,N2,N2 ,N2 ,N7,N7,N7 ,N7 -octakis(4-methoxyphenyl)-9,9 -spirobi(9H-fluorene)-2,2 ,7,7 tetramine (spiro-OMeTAD), poly(3-hexylthiophene-2,5-diyl) (P3HT), and poly((2,3-bis(3-octyloxyphenyl)-5,8-quinoxalinediyl)-2,5-thiophenediyl) TQ1 are studied for maximizing the device photovoltaic performance. The solar cell device with P3HT as a hole transport material gives the highest performance and the solar cell exhibit broad spectral absorption. These results indicate that Ag 2 S CQD have high potential for utilization as environmentally friendly light absorbing materials for solar cell application and that the hole transport material is critical to maximize the solar cell photovoltaic performance.

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Section: Introductionmentioning

confidence: 99%

Solution-Processed Environmentally Friendly Ag2S Colloidal Quantum Dot Solar Cells with Broad Spectral Absorption

et al. 2017

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“…The use of NCs in optoelectronic devices ranges from optical displays1 and transistors2 to solar cells 3. Specifically, photovoltaic devices fabricated from NCs are amenable to inexpensive room‐temperature solution processing, with the promise of yielding large‐scale thin films 4. Power conversion by a solar cell requires, in sequence, light absorption, charge carrier separation, charge transport to, and extraction at the contacts.…”

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confidence: 99%

Repairing Nanoparticle Surface Defects

et al. 2017

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Solar devices based on semiconductor nanoparticles require the use of conductive ligands; however, replacing the native, insulating ligands with conductive metal chalcogenide complexes introduces structural defects within the crystalline nanostructure that act as traps for charge carriers. We utilized atomically thin semiconductor nanoplatelets as a convenient platform for studying, both microscopically and spectroscopically, the development of defects during ligand exchange with the conductive ligands Na4SnS4 and (NH4)4Sn2S6. These defects can be repaired via mild chemical or thermal routes, through the addition of L‐type ligands or wet annealing, respectively. This results in a higher‐quality, conductive, colloidally stable nanomaterial that may be used as the active film in optoelectronic devices.

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“…They are capable of absorbing IR light (beyond 1 lm) and are also compatible with large-area, massmanufacturing deposition techniques such as spray-coating. 5 Solar cells based on 1.3 eV bandgap CQDs have achieved a record full-spectrum certified efficiency of 11.3%. 3 Recently, 1 eV bandgap CQD cells with the efficiencies of 7.3% full spectrum and 0.8% through a simulated silicon filter have been demonstrated.…”

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confidence: 99%