Multiscale Evolution of Bulk Heterojunction Solar Cell Active Layers under Thermal Stress

High open circuit voltage organic solar cells based upon fullerene free bulk heterojunction active layers

We have recently reported on a small organic molecule containing a bithiophene core with end-capping phthalimide units (PthTh2Pth) that exhibited a H-aggregation tendency in the solid state and high electron mobility in organic field effect transistors. In this contribution, we have studied both the physical and electrical properties of poly(3-hexylthiophene) (P3HT) and PthTh2Pth thin films by ...

Stability of Bulk-Heterojunction Blends for Solar Cell Applications

Polymer solar cells are a promising alternative to more traditional silicon solar cells. This is mainly due to the good solubility of organic semiconductors, which makes it possible to produce large-scale and mechanically flexible devices with roll-to-roll processes. To be able to fully utilise this promising technique the stability of the materials, used in these devices, must be guaranteed. T...

Supporting Information Thermal Conductivity of Organic Bulk Heterojunction Solar Cell: Unusual Binary Mixing

SI-Figure 1. Phase signal obtained from lock-in amplifier used to determine the thermal conductivity of BHJs (PBDTTT-EE and PBDTTT-DD respectively). BHJs composed of different PCBM volume fractions are presented in different colors. Experimental data are indicated as open circles, and the corresponding fits are shown in solid lines. Inset: acoustic echoes used to determine the actual aluminum f...

Bulk Heterojunction Solar Cells — Opportunities and Challenges

Role of additional PCBM layer between ZnO and photoactive layers in inverted bulk-heterojunction solar cells

In order to induce greater light absorption, nano-patterning is often applied to the metal-oxide buffer layer in inverted bulk-heterojunction(BHJ) solar cells. However, current homogeneity was significantly disturbed at the interface, leading to an efficiency that was not fully optimized. In this work, an additional PC61BM layer was inserted between the ZnO ripple and the photoactive layer to e...