TY - JOUR
T1 - Novel dopant-free hole-transporting materials for efficient perovskite solar cells
AU - Abdellah, Islam M.
AU - Chowdhury, Towhid H.
AU - Lee, Jae Joon
AU - Islam, Ashraful
AU - El-Shafei, Ahmed
N1 - Publisher Copyright:
© 2020 International Solar Energy Society
PY - 2020/8
Y1 - 2020/8
N2 - Two novel highly conjugated small organic molecules as hole transporting materials (HTMs) coded T(EDOT-TPA)2 and DBT(QT-TPA)2 were designed and developed by utilizing facile synthetic procedures with high yields. The fabricated perovskite solar cells (PSCs) utilizing these HTMs without any dopants under 1 sun illumination (100 mW cm−2, AM 1.5G) and surface area of 1.02 cm2 achieved a short circuit current (JSC = 19.23), open circuit voltage (VOC = 1.042), fill factor (FF = 0.679) and overall power conversion efficiency (PCE = 13.61%) for DBT(QT-TPA)2. While, T(EDOT-TPA)2 exhibited (JSC = 20.25, VOC = 1.04, FF = 0.583, and PCE = 12.27%). These dopant free HTM based PSCs achieved superior PCEs compared to that of undoped Spiro-OMeTAD (PCE = 9.34%) based PSCs and a comparable photovoltaic performance to the PSCs using doped Spiro-OMeTAD (JSC = 20.37, VOC = 1.057, FF = 0.74, and PCE = 15.93) as the HTM under same fabrication conditions. Noticeably, the absence of additives is of significant importance, as DBT(QT-TPA)2 and T(EDOT-TPA)2 based PSCs still produces a Jsc up to 20.25 mA cm−2 and a comparable PCE of 13.61%, which reduces the fabrication cost of cm sized PSCs.
AB - Two novel highly conjugated small organic molecules as hole transporting materials (HTMs) coded T(EDOT-TPA)2 and DBT(QT-TPA)2 were designed and developed by utilizing facile synthetic procedures with high yields. The fabricated perovskite solar cells (PSCs) utilizing these HTMs without any dopants under 1 sun illumination (100 mW cm−2, AM 1.5G) and surface area of 1.02 cm2 achieved a short circuit current (JSC = 19.23), open circuit voltage (VOC = 1.042), fill factor (FF = 0.679) and overall power conversion efficiency (PCE = 13.61%) for DBT(QT-TPA)2. While, T(EDOT-TPA)2 exhibited (JSC = 20.25, VOC = 1.04, FF = 0.583, and PCE = 12.27%). These dopant free HTM based PSCs achieved superior PCEs compared to that of undoped Spiro-OMeTAD (PCE = 9.34%) based PSCs and a comparable photovoltaic performance to the PSCs using doped Spiro-OMeTAD (JSC = 20.37, VOC = 1.057, FF = 0.74, and PCE = 15.93) as the HTM under same fabrication conditions. Noticeably, the absence of additives is of significant importance, as DBT(QT-TPA)2 and T(EDOT-TPA)2 based PSCs still produces a Jsc up to 20.25 mA cm−2 and a comparable PCE of 13.61%, which reduces the fabrication cost of cm sized PSCs.
KW - Hole transport materials
KW - Molecular engineering
KW - Perovskite solar cells
KW - Photovoltaics
KW - Solar energy
UR - http://www.scopus.com/inward/record.url?scp=85086148960&partnerID=8YFLogxK
U2 - 10.1016/j.solener.2020.06.016
DO - 10.1016/j.solener.2020.06.016
M3 - Article
AN - SCOPUS:85086148960
SN - 0038-092X
VL - 206
SP - 279
EP - 286
JO - Solar Energy
JF - Solar Energy
ER -