Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 16, Pages 7603-7611Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta01248a
Keywords
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Funding
- New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry Energy [20143030011560]
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning (MSIP) of Korea [NRF-2012M3A6A7054861, NRF-2015M1A2A2053004, NRF-2012M3A7B4049986, NRF-2016R1E1A1A01942593]
- [NRF-2016M3D1A1027663]
- [NRF-2016M3D1A1027664]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20143030011560] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2012M3A7B4049986, 2015M1A2A2053004, 2016M3D1A1027664, 2012M3A6A7054861] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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An acridine-based hole transporting material (ACR-TPA) without the spirobifluorene motif is synthesized via non complicated steps. The ACR-TPA film including Li-TFSI and 4-tert-butylpyridine (tBP) additives exhibits a hole mobility of 3.08 x 10(-3) cm(2) V-1 s(-1), which is comparable to the mobility of the classical spiro-MeOTAD (2.63 x 10(-3) cm(2) V-1 s(-1)), and its HOMO level of -5.03 eV is slightly lower than that of spiro-MeOTAD (-4.97 eV). ACR-TPA layers with different thicknesses are applied to MAPbI3 perovskite solar cells, where power conversion efficiency (PCE) increases as the ACR-TPA layer thickness increases due to increased recombination resistance and fast charge separation. The best PCE of 16.42% is achieved from the ca. 250 nm-thick ACR-TPA, which is comparable to the PCE of 16.26% for a device with spiro-MeOTAD in the same device configuration. It is thus anticipated that ACR-TPA can be a promising alternative to spiro-MeOTAD because of its lower cost and comparable photovoltaic performance.
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