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Cheng, Ming
Publications (3 of 3) Show all publications
Cheng, M., Li, Y., Liu, P., Zhang, F., Hajian, A., Wang, H., . . . Sun, L. (2017). A Perylenediimide Tetramer-Based 3D Electron Transport Material for Efficient Planar Perovskite Solar Cell. Solar RRL, 1(5), Article ID 1700046.
Open this publication in new window or tab >>A Perylenediimide Tetramer-Based 3D Electron Transport Material for Efficient Planar Perovskite Solar Cell
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2017 (English)In: Solar RRL, ISSN 2367-198X, Vol. 1, no 5, article id 1700046Article in journal (Refereed) Published
Abstract [en]

A perylenediimide (PDI) tetramer-based three dimensional (3D) molecular material, termed SFX-PDI4, has been designed, synthesized, and characterized. The low-lying HOMO and LUMO energy levels, high electron mobility and good film-formation property make it a promising electron transport material (ETM) in inverted planar perovskite solar cells (PSCs). The device exhibits a high power conversion efficiency (PCE) of 15.3% with negligible hysteresis, which can rival that of device based on PC61BM. These results demonstrate that three dimensional PDI-based molecular materials could serve as high performance ETMs in PSCs.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017
National Category
Materials Engineering Chemical Sciences
Research subject
Chemistry; SRA - Energy; Materials Science and Engineering
Identifiers
urn:nbn:se:kth:diva-207798 (URN)10.1002/solr.201700046 (DOI)000411389400004 ()
Funder
Swedish Energy AgencySwedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20170613

Available from: 2017-05-24 Created: 2017-05-24 Last updated: 2018-02-28Bibliographically approved
Cheng, M., Li, Y., Safdari, M., Chen, C., Liu, P., Kloo, L. & Sun, L. (2017). Efficient Perovskite Solar Cells Based on a Solution Processable Nickel(II) Phthalocyanine and Vanadium Oxide Integrated Hole Transport Layer. Advanced Energy Materials, 7(14), Article ID 1602556.
Open this publication in new window or tab >>Efficient Perovskite Solar Cells Based on a Solution Processable Nickel(II) Phthalocyanine and Vanadium Oxide Integrated Hole Transport Layer
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2017 (English)In: Advanced Energy Materials, ISSN 1614-6832, Vol. 7, no 14, article id 1602556Article in journal (Refereed) Published
Abstract [en]

An organic-inorganic integrated hole transport layer (HTL) composed of the solution-processable nickel phthalocyanine (NiPc) abbreviated NiPc-(OBu)(8) and vanadium(V) oxide (V2O5) is successfully incorporated into structured mesoporous perovskite solar cells (PSCs). The optimized PSCs show the highest stabilized power conversion efficiency of up to 16.8% and good stability under dark ambient conditions. These results highlight the potential application of organic-inorganic integrated HTLs in PSCs.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2017
National Category
Energy Engineering
Identifiers
urn:nbn:se:kth:diva-211741 (URN)10.1002/aenm.201602556 (DOI)000405839400009 ()2-s2.0-85018556856 (Scopus ID)
Note

QC 20170815

Available from: 2017-08-15 Created: 2017-08-15 Last updated: 2019-12-09Bibliographically approved
Chen, C., Cheng, M., Liu, P., Gao, J., Kloo, L. & Sun, L. (2016). Application of benzodithiophene based A-D-A structured materials in efficient perovskite solar cells and organic solar cells. Nano Energy, 23, 40-49
Open this publication in new window or tab >>Application of benzodithiophene based A-D-A structured materials in efficient perovskite solar cells and organic solar cells
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2016 (English)In: Nano Energy, ISSN 2211-2855, Vol. 23, p. 40-49Article in journal (Refereed) Published
Abstract [en]

In this work, we have designed and synthesized a novel molecular material, BDT-C1, in which the core unit, benzodithiophene (BDT), was functionalized by thiophene (TP) and benzo-[c][1,2,5]-thiadiazole (BTZ) derivatives to generate extended pi-conjugation. BDT-C1 shows high hole mobility and high conductivity in its pristine form, in combination with appropriate energy level alignment with respect to [CH3NH3]PbI3 and PC70BM, qualifying the material as a good candidate for application both in perovskite solar cells (PSCs) as dopant-free hole transport material (HTM) and in OSCs as donor material. The champion PSCs based on BDT-C1 show an average conversion efficiency (PCE) of 13.4% (scan forward: 13.9%; scan backward: PCE=12.9%, scan rate: 10 mV/s). Although the average efficiency obtained is slightly lower than that of reference devices based on the well-known doped HTM Spiro-OMeTAD (13.7%), the BDT-C1 based devices exhibit better stability. Moreover, BDT-C1 as a donor material in OSCs also shows good performance in combination with PC70BM as acceptor material, and an efficiency of 6.1% was obtained. The present results demonstrate that BDT-C1 works well as both donor material in OSCs as well as dopant-free HTMs for efficient PSCs.

Place, publisher, year, edition, pages
Elsevier, 2016
Keywords
Perovskite solar cells, Dopant-free, Hole transport material, Organic solar cells, Donor material
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-187795 (URN)10.1016/j.nanoen.2016.03.007 (DOI)000375045900006 ()2-s2.0-84961135334 (Scopus ID)
Funder
Swedish Energy AgencySwedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20160531

Available from: 2016-05-31 Created: 2016-05-30 Last updated: 2017-08-15Bibliographically approved
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