Study of photoexcitations in poly(3-hexylthiophene) for photovoltaic applications

Abstract

Articles you may be interested inHigh band gap poly (9,9-dihexylfluorene-alt-bithiophene) blended with [6,6]-phenyl C 61 butyric acid methyl ester for use in efficient photovoltaic devices Appl. Phys. Lett. 94, 023302 (2009); 10.1063/1.3070574 Improvement of photovoltaic response based on enhancement of spin-orbital coupling and triplet states in organic solar cells J. Appl. Phys. 103, 043909 (2008); 10.1063/1.2885349 Near-infrared photoconductive and photovoltaic devices using single-wall carbon nanotubes in conductive polymer films J. Appl. Phys. 98, 084314 (2005); 10.1063/1.2113419 Device annealing effect in organic solar cells with blends of regioregular poly(3-hexylthiophene) and soluble fullerene Appl. Phys. Lett. 86, 063502 (2005);

Optical, Electrical, and Magnetic Studies of Organic Solar Cells Based on Low Bandgap Copolymer with Spin ½ Radical Additives

“…For the PA and photoluminescence (PL) spectroscopies, we placed the films in a closed cycle He refrigerator cryostat at 50 K. The steady state PA spectrum was measured using a standard setup . We used for the pump excitation a diode laser at ℏω = 1.8 eV that was modulated at frequency, f of 310 Hz; whereas the output beam of an incandescent tungsten/halogen lamp was used as a probe light source.…”

“…Organic photovoltaic (OPV) is an emerging field that has seen a rapid development in recent years driven by the low cost, flexible device structure, and easy fabrication processes . In response to the low power conversion efficiency (PCE) of OPV based on bilayer device structure in which, donor (D) and acceptor (A) layers are deposited sequentially, the OPV research field has moved to devices based on bulk heterojunction (BHJ) structure from donor–acceptor (D–A) blends, where bicontinuous interpenetrating network of separated donor and acceptor domains are formed. BHJ photovoltaic cells maximize photon absorption and allows photogenerated singlet excitons in the donor domain to reach the D–A interfaces before they recombine .…”

Influence of the Molecular Weight and Size Dispersion of the Electroluminescent Polymer on the Performance of Air-Stable Hybrid Light-Emitting Diodes

“…Similar edge-on orientation with the strongest (100) peak associated with side chain distances along the out-of-plane direction has been reported for a large family of thiophenes. 31,32 All samples here show these characteristic features Further information has been obtained by AFM studies (Figure 6). It is interesting to point out the low roughness of the samples ranging between 1.8 and 3.4 nm (see Table 4).…”

Ultrafast Transient Spectroscopy of Polymer/Fullerene Blends for Organic Photovoltaic Applications

“…This new state must be related to the D-A interfaces in the films, and we thus propose that is a CT exciton at the D-A interface. In contrast, the background PA spectrum in the mid-IR (Figure 3a) is very similar to the P 1 band in the polaron doping induced absorption spectrum [8,37,38], showing that charge polarons are indeed photogenerated in this RR-P3HT/PCBM film, in agreement with the high solar cells efficiency based on this blend [8]. We conclude that the charge photogeneration process in the blend proceeds in two stages [8,15].…”