High efficiency solid-state sensitized heterojunction photovoltaic device

Abstract

SummaryThe high molar extinction coefficient heteroleptic ruthenium dye, NaRu(4,4 -bis(5-(hexylthio)thiophen-2-yl)-2,2 -bipyridine) (4-carboxylic acid-4 -carboxylate-2,2 -bipyridine) (NCS) 2 , exhibits certified 5% electric power conversion efficiency at AM 1.5 solar irradiation (100 mW cm −2 ) in a solid-state dye-sensitized solar cell using 2,2 ,7,7 -tetrakis-(N,N-dipmethoxyphenylamine)-9,9 -spirobifluorene (spiro-MeOTAD) as the organic hole-transporting material. This demonstration elucidates a class of photovoltaic devices with potential for low-cost power generation. © 2010 Elsevier Ltd. All rights reserved.The dye-sensitized nanocrystalline solar cell (DSC) offers special opportunities in the realm of renewable energy sources primarily stemming from its use of low-cost mate- * Corresponding author. Fax: +86 431852 62953. rials and its lack of stringent conditions required for device manufacturing [1]. In the quest for new sensitizers leading to an enhancement of the photon-to-electron conversion efficiency, the creation of new ruthenium dyes still remains a promising option. Indeed, recent improvements in the design and synthesis of new dyes have made it possible to obtain greater than 11% light-to-energy conversion efficiencies. The majority of these newly developed sensitizers involve polypyridyl-type complexes of ruthenium [2][3][4]. Advantages in terms of improved sealing properties and long-term cell stability can be realized by replacing the liquid electrolytes utilized in DSC by a solid-state 1748-0132/$ -see front matter

From Flat to Nanostructured Photovoltaics: Balance between Thickness of the Absorber and Charge Screening in Sensitized Solar Cells

“…4,16,[28][29][30] The development of appropriated models of the physical processes in these devices in mandatory for a focused research that allows further efficiency increase. In addition, the determination of the fundamental parameters governing solar cell performance would be an extraordinary tool for this purpose.…”

High performance hybrid solar cells sensitized by organolead halide perovskites

“…Hybrid solar cells present a possibility to overcome these disadvantages by using solid-state ptype hole transporting materials (HTM) in lieu of the liquid electrolyte. [22][23][24][25][26][27][28] Most recently, research in this eld has achieved great progress: PCEs exceeding 5% have been obtained for solar cells consisting of Sb 2 S 3 nanocrystals as the sensitizer, mesoscopic TiO 2 as the n-type electron transporting material (ETM) and p-type polymers as the HTM.…”

Solid-State Dye-Sensitized Solar Cells using Ordered TiO2 Nanorods on Transparent Conductive Oxide as Photoanodes

“…The IPCE of device D reaches a maximum of 55% at 540 nm. 32 The lower photocurrents observed in SSDSC devices utilizing the nanorod films correlated with a decrease in the amount of adsorbed dye. As indicated by the SEM images (Figure 1), the average dimensions of the rod-shaped rutile rods (50 nm diameter) are larger than that of the spherically shaped antase particles (20 nm diameter), implying that the particle density and thus internal surface area of the nanorod-based film, is smaller than that of the colloidal nanoparticle-based film.…”

“…32 The incident photon-to-current conversion efficiency (IPCE) spectrum for device A exceeds 40% over the spectral range of 500 to 560 nm reaching a maximum of approximately 44% at 540 nm (see Figure 2b). The IPCE of device D reaches a maximum of 55% at 540 nm.…”