Increasing efficiency of hybrid p-CuI/n-Cl6SubPc heterojunction through the interface engineering

Recent advances in subphthalocyanines and related subporphyrinoids

“…248 However, they show some diffraction features, attributed to an increasing molecular ordering, upon annealing on the silicon surface heating at a rate of <30 °C min −1 to 150 °C for 10–15 min under continuous Ar flow, followed by a slow cooling down to room temperature. 249 More interestingly, annealing of a Cl 6 SubPc-Cl ( 2 ) layer deposited on a CuI surface leads to both appearance of a well-defined ordering of molecules and texturing of the halide underlayer. The role of the CuI is not only to be a growth surface but also a donor component of the hybrid p-CuI/n-Cl 6 SubPc-Cl ( 2 ) heterojunction, which shows improved performance in comparison with the non-structured HHJ device.…”

“…In this case, CuI not only acts as a morphology control layer but also as donor material. 249 The outdoor stability of OSCs with SubPcs acting as acceptor material has also been investigated by the group of Bender. 428 To this end, the authors firstly evaluated the PCE loss over time of a-6T/SubPc (bearing -Cl, -OPh or -Ph at the axial position) planar heterojunction devices using different ISOS protocols.…”

Hexachlorinated Boron(III) Subphthalocyanine as Acceptor for Organic Photovoltaics: A Brief Overview

“…This favors their application in multilayer photovoltaic devices. However, they are electrically resistive [21,24,35], with the charge carrier mobility (electrons) much lower than in fullerenes ( Table 1). In the literature, the Cl 6 SubPc films are commonly treated as amorphous [21].…”

“…In the literature, the Cl 6 SubPc films are commonly treated as amorphous [21]. As recently shown, a correct choice of deposition surface and temperature contributes to the production of crystalline films of Cl 6 SubPc with improved conductivity, which in turn upgrades the parameters of photovoltaic devices [24,35]. To our knowledge, the effect of intentional or unintentional (e.g., atmospheric) doping of the Cl 6 SubPc matrix on its conducting properties has not been investigated so far.…”

“…Such benefits stimulate appearance of new heterojunctions designs employing this compound and steady interest in future research. For instance, such drawbacks as low charge carrier mobility in thin films can be overcome using morphology engineering [35]. Doping of the Cl 6 SubPc molecular matrix with appropriate agents could be another option for improvement of the conducting properties [30].…”