Photovoltaic device performances

Brumbach M, Placencia D, Armstrong NR (2008) Titanyl phthalocyanine/Cgo heterojunctions band-edge offsets and photovoltaic device performance. J Phys Chem C 112 3142... [Pg.207]

Tanveer M, Habib A, Khan MB (2013) Dependence of organic/inorganic photovoltaic device performance on precursor s concentration used for electrospun Ti02 nanofibers. Nano 8 1350033. doi 10.1142/S1793292013500331... [Pg.161]

Concerning the photovoltaic devices, when subjected to solar emission at AM 1.5, the short-circuit current (Isc) signals were 480,530, and 600 pA for Morus nigra, Morus nigra plus P-carotene and Mix, respectively. This means that the best performances were observed in the case of the blend of all organic derivatives used. [Pg.251]

With the D S SCs containing Hibiscus surattensis extract, the best performances were probably obtained because of the large amount of dye adsorbed on Ti02 (lxl cm2 active surface) in comparison with the other extracts from tropical flowers. Incident photon to current conversion efficiency (IPCE) values of 76% were calculated (2 — 590 nm). Jsc was 5.45 mAcm-2, Voc = 392mV, FF — 54%, and efficiency = 1.14%. Also, the stability of the photovoltaic devices was the best in the case of Hibiscus surattensis, even though it needs to be improved to achieve real long-term stability, especially as far as the sealing quality is concerned. [Pg.252]

Siemer, K. Klaer, J. Luck, I. Braunig, D. 2000. Influence of crystal orientation on device performance of CuInS2 solar cells. Proceedings of the 28th IEEE Photovoltaic Specialists Conference. IEEE, Piscataway, NJ. pp. 630-633. [Pg.197]

Q Zhou, Q Hou, L Zheng, X Deng, G Yu, and Y Cao, Fluorene-based low band-gap copolymers for high performance photovoltaic devices, Appl. Phys. Lett., 84 1653-1655, 2004. [Pg.42]

Esterification constitutes a valuable alternative to the amidation strategy. As with amidation, the formation of the ester bond is performed following a first reaction step with acyl chloride. The ester bond has been extensively utilized to attach many organic and inorganic moieties. Porphyrins are a classic example of substrates covalently bound via esterification strategies their photoinduced electron transfer to the nanotube has been studied for applications in molecular electronics and photovoltaic devices (Fig. 3.6) [21]. [Pg.49]

Solar energy conversion and photovoltaic devices encompass one of the most active applied topics of research in this area191. Thus, photoelectrochemical cells based on electrodes (Sn02, Pt) coated with tetrapyrroles have been studied for a long time191-194. Most studies were performed with phthalocyanines due to their stability and wide range of redox... [Pg.407]

Photovoltaic devices made of selenium have been known since the 19th Century. Pioneering research in semiconductors, which led to the invention of the transistor in 1947, formed the basis of the modem theory of photovoltaic performance. From this research, die silicon solar cell was the first known photovoltaic device that could convert a sufficient amount of the sun s energy to power complex electronic circuits. The conventional silicon cell is a solid-state device in which a junction is formed between single crystals of silicon separately doped with impurity atoms in order to create n (negative) regions and p (positive) regions which respectively are receptors to electrons and to holes (absence of electrons). See also Semiconductors. The first solar cell to be demonstrated occurred at Bell Laboratories (now AT T Bell Laboratories) in Murray Hill, New Jersey in 1954. [Pg.1513]

Now, consider stability. If a satisfactory initial system or component performance and cost are assumed, then in many cases the critical issue is to maintain the physical behavior of materials adjoining an interface for up to 30 years. The physical behavior may include properties that directly influence solar device performance, such as reflectance, transmittance, absorptance, emittance, and photovoltaic efficiency or solar device performance may be indirectly affected by properties such as adhesion, permeability, photo-oxidative stability, or interdiffusion. The required stability of interfaces in SECS components is counter to basic physics and chemistry, because atoms at interfaces must be more reactive and thermodynamically less stable than when in the bulk of materials (2). Yet, the density of solar energy requires deploying systems with large interfacial... [Pg.329]

The sensitization of semiconductors is a special example of electron transfer quenching and may prove to be very important. A photoexcited electron may, for example, be injected with high quantum yield into the semiconductor conduction band, to produce a photovoltaic device. The hole that is left behind may then perform some useful oxidation process. [Pg.285]

In recent years, an ever increasing number of lithographic techniques have emerged to complement optical lithography, which is still the work horse for practically all pattern replication processes. These developments are driven not only by the need for methods for the replication of sub-100 nm patterns (where conventional lithography is expected to meet its limits), but also by the invention of new high performance, low cost technologies, for example all-polymer based electronics, displays or photovoltaic devices. [Pg.22]

The cell is on the verge of commercialization, offering a potential alternative for the currently used silicon-based photovoltaic devices.12 An unprecedented conversion efficiency of 11% could be manufactured from relatively cheap materials.19 The most up-to-date efficient DSSCs are based on ruthenium complexes. Several representative ruthenium sensitizers possess high extinction coefficient and high photovoltaic performance are shown in Scheme 1.15-19... [Pg.162]

Photovoltaic devices based on pure 29 and 29 PCBM blend as the active layer is fabricated. It was interesting to observe that a device with pure 29 showed a higher power conversion efficiency (0.05%) compared to that consisting of a 29/PCBM blend (0.0.0024% to 0.041%). The good performance in the photovoltaic cells with 29 only was attributed to the efficient charge separation process and that the material exhibits efficient hole and electron transport. The C6o moieties facilitated that electron transport, while the holes are transported via the hopping between Pt2-thiophene units. [Pg.179]

The solar to electric power conversion efficiency of dye-sensitized solar cells of laboratory scale (0.158 cm2), validated by an accredited photovoltaic calibration laboratory, has reached 11.1% under standard reporting conditions, i.e., air mass 1.5 global sunlight at 1000 Wm-2 intensity and 298 K temperature, rendering it a credible alternative to conventional p-n junction photovoltaic devices [68]. Photovoltaic performance data obtained with a sandwich cell under illumination by simulated AM 1.5 solar light using complex 26 are shown in Fig. 16. At 1 sun the 26-sensitized solar cell exhibited 17.73 =b 0.5 mA current, 846 mV potential, and a fill factor of 0.75 yielding an overall conversion efficiency of 11.18%. [Pg.141]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...