上海大学の陳助教とのスクアリリウム誘導体を用いた有機薄膜太陽電池に関する「Comparison of the Solution and Vacuum-Processed Small-Molecule Bulk Heterojunction Solar Cells Based on a Near-Infrared Absorbing Squaraine Dye」と題する共同研究論文が Frontiers in Chemistry_Organic Chemistry (IF: 4.155) に受理されました！
Abstract: Squaraine dyes have shown promising properties for high performance organic solar cells due to their advantages of high absorption coefficients and intense absorption in the visible and near-infrared (NIR) regions. In this work, to directly compare the photovoltaic performance of solution- and vacuum-processed small-molecule bulk heterojunction (SMBHJ) solar cells, we employed a squaraine dye, 2,4-bis[4-(N,N-diisobutylamino)-2,6-dihydroxyphenyl] squaraine (DIBSQ), as an electron donor combined with fullerene acceptors to fabricate SMBHJ cells either from solution or vacuum deposition process. The solution-processed SMBHJ cell possesses a power conversion efficiency (PCE) of ~4.3%, while the vacuum-processed cell provides a PCE of ~6.3%. Comparison of the device performance shows that the vacuum-processed SMBHJ cells possess higher short-circuit current density, fill factor and thus higher PCE than the solution-processed devices, which should be ascribed to more efficient charge transport and charge extraction in the vacuum-processed SMBHJ cells. However, solution-processed SMBHJ cells demonstrate more pronounced temperature-dependent device performance and higher device stability. This study indicates the great potential of DIBSQ in photovoltaic application via both of solution and vacuum processing techniques.
