All-solid-state hybrid solar cells based on a new organometal halide perovskite sensitizer and one-dimensional TiO2 nanowire arrays

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Abstract

A novel organometal halide perovskite (CH3NH3PbI2Br) is synthesized and used as a visible light absorber to sensitize one-dimensional (1D) TiO2 nanowire arrays (NWAs) for all-solid-state hybrid solar cells. It achieved a power conversion efficiency (PCE) of 4.87% and an open circuit voltage (Voc) of 0.82 V, both higher than those of its analogue CH3NH3PbI3.

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Growth of oriented single-crystalline rutile TiO(2) nanorods on transparent conducting substrates for dye-sensitized solar cells.

Bin Liu, Eray Aydil (2009)

Dye-sensitized solar cells (DSSCs) made from oriented, one-dimensional semiconductor nanostructures such as nanorods, nanowires, and nanotubes are receiving attention because direct connection of the point of photogeneration with the collection electrode using such structures may improve the cell performance. Specifically, oriented single-crystalline TiO(2) nanorods or nanowires on a transparent conductive substrate would be most desirable, but achieving these structures has been limited by the availability of synthetic techniques. In this study, a facile, hydrothermal method was developed for the first time to grow oriented, single-crystalline rutile TiO(2) nanorod films on transparent conductive fluorine-doped tin oxide (FTO) substrates. The diameter, length, and density of the nanorods could be varied by changing the growth parameters, such as growth time, growth temperature, initial reactant concentration, acidity, and additives. The epitaxial relation between the FTO substrate and rutile TiO(2) with a small lattice mismatch plays a key role in driving the nucleation and growth of the rutile TiO(2) nanorods on FTO. With TiCl(4)-treatment, a light-to-electricity conversion efficiency of 3% could be achieved by using 4 mum-long TiO(2) nanorod films as the photoanode in a DSSC.

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Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies

D Lupo, M Grätzel, H. Spreitzer … (1998)

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Photoinduced electron transfer from semiconductor quantum dots to metal oxide nanoparticles.

Kevin Tvrdy, Pavel Frantsuzov, Prashant Kamat (2011)

Quantum dot-metal oxide junctions are an integral part of next-generation solar cells, light emitting diodes, and nanostructured electronic arrays. Here we present a comprehensive examination of electron transfer at these junctions, using a series of CdSe quantum dot donors (sizes 2.8, 3.3, 4.0, and 4.2 nm in diameter) and metal oxide nanoparticle acceptors (SnO(2), TiO(2), and ZnO). Apparent electron transfer rate constants showed strong dependence on change in system free energy, exhibiting a sharp rise at small driving forces followed by a modest rise further away from the characteristic reorganization energy. The observed trend mimics the predicted behavior of electron transfer from a single quantum state to a continuum of electron accepting states, such as those present in the conduction band of a metal oxide nanoparticle. In contrast with dye-sensitized metal oxide electron transfer studies, our systems did not exhibit unthermalized hot-electron injection due to relatively large ratios of electron cooling rate to electron transfer rate. To investigate the implications of these findings in photovoltaic cells, quantum dot-metal oxide working electrodes were constructed in an identical fashion to the films used for the electron transfer portion of the study. Interestingly, the films which exhibited the fastest electron transfer rates (SnO(2)) were not the same as those which showed the highest photocurrent (TiO(2)). These findings suggest that, in addition to electron transfer at the quantum dot-metal oxide interface, other electron transfer reactions play key roles in the determination of overall device efficiency.

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Journal

Journal ID (publisher-id): NANOHL

Title: Nanoscale

Abbreviated Title: Nanoscale

Publisher: Royal Society of Chemistry (RSC)

ISSN (Print): 2040-3364

ISSN (Electronic): 2040-3372

Publication date Created: 2013

Publication date (Print): 2013

Volume: 5

Issue: 8

Page: 3245

Article

DOI: 10.1039/c3nr00218g

PubMed ID: 23508213

SO-VID: 3054740c-e3cf-4f79-89c7-f52538ea0e64

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All-solid-state hybrid solar cells based on a new organometal halide perovskite sensitizer and one-dimensional TiO2 nanowire arrays

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Renewable Energy - Solar

Most cited references 17

Growth of oriented single-crystalline rutile TiO(2) nanorods on transparent conducting substrates for dye-sensitized solar cells.

Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies

Photoinduced electron transfer from semiconductor quantum dots to metal oxide nanoparticles.

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