Delicate crystallinity control enables high-efficiency P3HT organic photovoltaic cells

Abstract

As a benchmark semiconducting polymer, poly(3-hexyl-thiophene) (P3HT) has been broadly used to construct a wide range of organic electronic devices such as photovoltaic cells, photodetectors, thermoelectrics, and transistors. In the...

Brominated Polythiophene Reduces the Efficiency‐Stability‐Cost Gap of Organic and Quantum Dot Hybrid Solar Cells

“…With this challenge in mind, we further examined the thermal stability of the developed hybrid QD/polythiophene solar cells under 85 °C thermal aging in inert condition according to our prior reports. [ 14,15 ] Encouragingly, hybrid QD/polythiophene solar cells presented a striking upward trend after 2 h thermal annealing, especially for P3HT‐Br‐based devices ( Figure 7 a). The promising performance enhancement under thermal stress was similar to the phenomenon that PbS QD solar cells witnessed the significant performance improvement after the storage in dry air.…”

“…GIWAXS results were measured at beamline 1W1A, Beijing synchrotron radiation facility (BSRF) and the detailed procedures are well documented in the previous reports. [14,15,82]…”

“…Polythiophenes, one class of the facile‐processable and low‐cost photovoltaic materials, have drawn broad research interest in various solution‐processed photovoltaics, including organic solar cells (OSCs), [ 14–18 ] perovskite solar cells (PSCs) [ 19–23 ] and quantum dot solar cells (QDSCs). [ 24–26 ] For OSCs, polythiophenes have exhibited great competitiveness over high‐efficiency donors due to the markedly reduced synthesis steps and cost (two synthesis steps and 10 $ g −1 cost via eco‐friendly polycondensation).…”

“…[5][6][7][8] To counter the challenges, more and more efforts have been devoted to developing high-performance and stable solar cells with low-cost photovoltaic materials, [9,10] considering the generally accepted golden triangle (efficiency, lifetime, and cost). [11][12][13] Polythiophenes, one class of the facileprocessable and low-cost photovoltaic materials, have drawn broad research interest in various solution-processed photovoltaics, including organic solar cells (OSCs), [14][15][16][17][18] perovskite solar cells (PSCs) [19][20][21][22][23] and quantum dot solar cells (QDSCs). [24][25][26] For OSCs, polythiophenes have exhibited great competitiveness over high-efficiency donors due to the markedly reduced synthesis steps and cost (two synthesis steps and 10 $ g −1 cost viaThe emerging solution-processed solar cells have attracted worldwide effort in the last decade.…”

Regioisomeric Polymer Semiconductors Based on Cyano-Functionalized Dialkoxybithiophenes: Structure–Property Relationship and Photovoltaic Performance

“…The HH coupling typically results in a highly twisted molecular backbone due to the accompanying large steric hindrance, thereby reducing the effective π-conjugation and crystallinity of the resulting polymer. Poly(3-alkylthiophene) containing a small amount of HH linkage exhibited obviously inferior device performance in both OFETs and PSCs [21][22][23]. In contrast, the HT coupling yielded a higher polymer film crystallinity with a planar backbone conformation and achieved improved optoelectronic properties, as exemplified by the regioregular HT-linked poly(3-hexylthiophene) (rr-P3HT) [2,24,25].…”