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Solution-processed small-molecule solar cells: breaking the 10% power conversion efficiency.

Liu Y, Chen CC, Hong Z, Gao J, Yang YM, Zhou H, Dou L, Li G, Yang Y - Sci Rep (2013)

Bottom Line: This study explores the photovoltaic properties of this molecule as a donor, with a fullerene derivative as an acceptor, using solution processing in single junction and double junction tandem solar cells.A homo-tandem solar cell based on SMPV1 was constructed with a novel interlayer (or tunnel junction) consisting of bilayer conjugated polyelectrolyte, demonstrating an unprecedented PCE of 10.1%.These results strongly suggest solution-processed small molecular materials are excellent candidates for organic solar cells.

View Article: PubMed Central - PubMed

Affiliation: 1] Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, USA [2] California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, USA [3].

ABSTRACT
A two-dimensional conjugated small molecule (SMPV1) was designed and synthesized for high performance solution-processed organic solar cells. This study explores the photovoltaic properties of this molecule as a donor, with a fullerene derivative as an acceptor, using solution processing in single junction and double junction tandem solar cells. The single junction solar cells based on SMPV1 exhibited a certified power conversion efficiency of 8.02% under AM 1.5 G irradiation (100 mW cm(-2)). A homo-tandem solar cell based on SMPV1 was constructed with a novel interlayer (or tunnel junction) consisting of bilayer conjugated polyelectrolyte, demonstrating an unprecedented PCE of 10.1%. These results strongly suggest solution-processed small molecular materials are excellent candidates for organic solar cells.

No MeSH data available.


Device performance of single junction solar cells, and performance parameters of optimized device with PDMS (0.5 mg ml−1) as additive under varied light intensity (from 1.2 to 100 mW cm−2).(a), Current density versus voltage (J–V) curves under AM 1.5 G irradiation at 100 mW cm−2. (b), Absorption spectra, EQE and IQE. (c), JSC as a function of light intensity in a double-logarithmic scale for devices using PDMS as additive. (d), VOC as a function of light intensity in a semi-logarithmic scale for devices using PDMS as additive.
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f2: Device performance of single junction solar cells, and performance parameters of optimized device with PDMS (0.5 mg ml−1) as additive under varied light intensity (from 1.2 to 100 mW cm−2).(a), Current density versus voltage (J–V) curves under AM 1.5 G irradiation at 100 mW cm−2. (b), Absorption spectra, EQE and IQE. (c), JSC as a function of light intensity in a double-logarithmic scale for devices using PDMS as additive. (d), VOC as a function of light intensity in a semi-logarithmic scale for devices using PDMS as additive.

Mentions: Single junction OSC devices are important building blocks for tandem architecture. Here we first tested SMPV1 in a device structure of ITO/PEDOT:PSS/SMPV1:PC71BM/Ca/Al. Current density-voltage (J–V) curves are shown in Fig. 2a and the parameters listed in Table 1. With the optimized weight ratio of 1:0.8 for SMPV1:PC71BM, a PCE of 7.2% was obtained, with a JSC of 11.4 mA cm−2, a VOC of 0.93 V, and an FF of 68%. By adding 0.5 mg mL−1 PDMS4042 in the blend solution, the PCE was further improved to 8.1%, with a VOC of 0.94 V, a JSC of 12.5 mA cm−2, and a notable FF of 69%. The encapsulated device was sent to the Newport Corporation for certification. A certified efficiency of 8.02% was obtained, as shown in Fig. S14 (Supplementary information).


Solution-processed small-molecule solar cells: breaking the 10% power conversion efficiency.

Liu Y, Chen CC, Hong Z, Gao J, Yang YM, Zhou H, Dou L, Li G, Yang Y - Sci Rep (2013)

Device performance of single junction solar cells, and performance parameters of optimized device with PDMS (0.5 mg ml−1) as additive under varied light intensity (from 1.2 to 100 mW cm−2).(a), Current density versus voltage (J–V) curves under AM 1.5 G irradiation at 100 mW cm−2. (b), Absorption spectra, EQE and IQE. (c), JSC as a function of light intensity in a double-logarithmic scale for devices using PDMS as additive. (d), VOC as a function of light intensity in a semi-logarithmic scale for devices using PDMS as additive.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3842540&req=5

f2: Device performance of single junction solar cells, and performance parameters of optimized device with PDMS (0.5 mg ml−1) as additive under varied light intensity (from 1.2 to 100 mW cm−2).(a), Current density versus voltage (J–V) curves under AM 1.5 G irradiation at 100 mW cm−2. (b), Absorption spectra, EQE and IQE. (c), JSC as a function of light intensity in a double-logarithmic scale for devices using PDMS as additive. (d), VOC as a function of light intensity in a semi-logarithmic scale for devices using PDMS as additive.
Mentions: Single junction OSC devices are important building blocks for tandem architecture. Here we first tested SMPV1 in a device structure of ITO/PEDOT:PSS/SMPV1:PC71BM/Ca/Al. Current density-voltage (J–V) curves are shown in Fig. 2a and the parameters listed in Table 1. With the optimized weight ratio of 1:0.8 for SMPV1:PC71BM, a PCE of 7.2% was obtained, with a JSC of 11.4 mA cm−2, a VOC of 0.93 V, and an FF of 68%. By adding 0.5 mg mL−1 PDMS4042 in the blend solution, the PCE was further improved to 8.1%, with a VOC of 0.94 V, a JSC of 12.5 mA cm−2, and a notable FF of 69%. The encapsulated device was sent to the Newport Corporation for certification. A certified efficiency of 8.02% was obtained, as shown in Fig. S14 (Supplementary information).

Bottom Line: This study explores the photovoltaic properties of this molecule as a donor, with a fullerene derivative as an acceptor, using solution processing in single junction and double junction tandem solar cells.A homo-tandem solar cell based on SMPV1 was constructed with a novel interlayer (or tunnel junction) consisting of bilayer conjugated polyelectrolyte, demonstrating an unprecedented PCE of 10.1%.These results strongly suggest solution-processed small molecular materials are excellent candidates for organic solar cells.

View Article: PubMed Central - PubMed

Affiliation: 1] Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, USA [2] California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, USA [3].

ABSTRACT
A two-dimensional conjugated small molecule (SMPV1) was designed and synthesized for high performance solution-processed organic solar cells. This study explores the photovoltaic properties of this molecule as a donor, with a fullerene derivative as an acceptor, using solution processing in single junction and double junction tandem solar cells. The single junction solar cells based on SMPV1 exhibited a certified power conversion efficiency of 8.02% under AM 1.5 G irradiation (100 mW cm(-2)). A homo-tandem solar cell based on SMPV1 was constructed with a novel interlayer (or tunnel junction) consisting of bilayer conjugated polyelectrolyte, demonstrating an unprecedented PCE of 10.1%. These results strongly suggest solution-processed small molecular materials are excellent candidates for organic solar cells.

No MeSH data available.