Studies on homologous random and alternating segmented conjugated polymers with and without silicon synthesized by ADMET

Using acyclic diene metathesis (ADMET), we synthesized homologous luminescent conjugated polymers with two aromatic segments based on thiophene and substituted phenylene, either alternating or randomly distributed, and either directly connected or separated by Si-linkers.

Poly(pentacyclic lactam-alt-diketopyrrolopyrrole) for field-effect transistors and polymer solar cells processed from non-chlorinated solvents

A highly crystalline conjugated polymer incorporating two electron-deficient units was applied in high performance organic field-effect transistors and polymer solar cells.

Enhancing the photovoltaic performance of binary acceptor-based conjugated polymers incorporating methyl units

“Binary acceptors” conjugated polymers with methyl side units were found to provide high photocurrent and efficiency in solar cells due to the small crystal domain of polymers in blended thin films.

Enhancing the performance of polymer solar cells using CuPc nanocrystals as additives

There is an increasing interest in the use of different nanoparticles as additives in polymer solar cells for enhancing the light absorption of active layers as well as their power conversion efficiency (PCE). In this paper, we report a PCE enhancement by simply adding copper phthalocyanine (CuPc) nanocrystals into photovoltaic devices based on a poly(3-hexylthiophene) (P3HT): fullerene system. Two kinds of device structure were studied: the first one is a CuPc nanocrystal suspension spin coated on the poly(3,4-ethylenedioxythiophene) polystyrene sulfonate-coated substrate; the second one is the CuPc nanocrystal suspension added into the active layer solutions. It is proved that incorporating organic semiconductor nanocrystals into the active layer can help trap light and enhance the crystallinity of the active layers, thus improving the device performance. This strategy might be generally compatible with a broad range of organic photovoltaic materials and offers an effective approach to enhance the device performance.

New poly(selenophene–thiophene) bearing π-conjugating spacers for polymer field-effect transistors and photovoltaic cells

Five new poly(selenophene–thiophene) were synthesized for polymer optoelectronic applications. The hole field effect mobility and polymer photovoltaic power conversion efficiency could be as high as 0.27 cm² V⁻¹ s⁻¹ and 2.3 %, respectively.