Performance correlated with device layout and illumination area in solar cells based on polymer and aligned ZnO nanorods

Solution-processed solar cells based on inorganic bulk heterojunctions with evident hole contribution to photocurrent generation

“…17 Clearly, increasing T c also leads to a significant improvement in the device FF. 7b), which is quite different from the previous reports on DSC, 44,46 HPSC 28,45,47 and ISC devices formed by infiltrating CuInS 2 nanoparticles into porous TiO 2 films. 18 Moreover, our FF values are close to those reported in the TiO 2 /Sb 2 S 3 (200-250 nm)/P3HT (150 nm) 41 and ZnO/ Sb 2 S 3 (50-350 nm)/P3HT (40 nm) 42 planar hybrid solar cells, and in the planar ISCs of CdS/Sb 2 S 3 (50-340 nm)/PbS (200 nm) heterojunctions.…”

“…The V oc of around 0.35 V is comparable to the BHJ solar cells fabricated by electrodepositing the bulk Cu 2 O layer into TiO 2 -NAs, 18 but much higher than that in the devices with an electrodeposited bulk Cu 2 O layer in ZnO-NAs. 45 It has been well demonstrated that the IMPS responses of DSCs 46 and HPSCs 28,47 theoretically appear in the IV quadrant of the complex plane and spiral into the origin in high frequency regimes, when the photogenerated hole contribution to photocurrent and the lag time of charge generation behind excitation are ignorable. The FF values (B29-37%) in our devices are comparable to the data reported in the ISCs based on the BHJs of Cu 2 O/ZnO-NAs 17 and Cu 2 O/ TiO 2 -NAs.…”

“…The J-V data were measured under AM 1.5 illumination (100 mW cm À2 ) from the FTO side. 45 During IMVS and IMPS measurements, a sinusoidal perturbation with a small depth of d (i.e., I ac = I 0 de iot ) is superimposed on the background light intensity I 0 , to form a modulated illumination condition [i.e., I = I 0 (1 + de iot )]. With increasing T c for Sb 2 S 3 crystallization, short-circuit current ( J sc ), open-circuit voltage (V oc ) and fill factor (FF) are significantly improved, leading to the efficiency Z of 2.11% for T c = 400 1C.…”

In situ synthesis of P3HT-capped CdSe superstructures and their application in solar cells

“…Importantly, bulk heterojunction (BHJ) solar cells based on intimate blends of organic polymer as the donor and inorganic nanomaterials as the acceptor are currently attracting increasingly widespread scientific and technological interests because of the advantages, resulting from these two types of materials, such as low cost, outstanding chemical and physical properties, easy preparation from organic polymers, high electron mobility, excellent chemical and physical stabilities, size tunability, and complementary light absorption from inorganic semiconductors [6-8]. Various organic–inorganic hybrid solar cells have been reported based on the conjunction of organic polymers, such as poly(3-hexylthiophene) (P3HT) [9-12], poly(3,4-ethylenedioxythio-phene) with poly-(styrene sulfonate) (PEDOT:PSS) [13], poly[2-methoxy-5-(3 ′ ,7 ′ -dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) [14], and poly(2-methoxy,5-(2-ethyl-hexyloxy)- p -phenyl vinylene) (MEH-PPV) [15,16], and inorganic nanocrystals, such as CdSe nanorods [17], hyperbranched CdSe nanocrystals [9,14,18], ZnO [19,20], PbS [10,21], Sb 2 S 3 [11,12], and Si nanocrystals [22]. …”

Efficiency Enhancement of Dye‐Sensitized Solar Cells by the Addition of an Oxidizing Agent to the TiO2 Paste

“…This improved performance of device 2.0 may be attributed to the smaller number of electrontrap sites (carbon residue) present on the TiO 2 surface, which minimizes the electron-recombination reaction and allows faster movement of the electrons towards the FTO substrate. [16,28] Working electrodes of the dye-sensitized solar cells were fabricated by using TiO 2 paste that contained four different weight percentages (0.5, 1.0, 1.5, and 2.0 wt %) of the oxidizing agent as well as by using the reference paste (0 wt % DNSA). The corresponding devices were denoted based on the weight percentage of DNSA used, that is, device 0.5, device 1.0, device 1.5, device 2.0, and device 0, respectively (for a detailed procedure, see the Experimental Section).…”