journal article·2010-08-10

Flexible, Polymer‐Supported, Si Wire Array Photoelectrodes

Joshua M. Spurgeon, Shannon W. Boettcher, Michael D. Kelzenberg, Bruce S. Brunschwig, Harry A. Atwater, Nathan S. Lewis

Advanced Materials· Volume 22· Issue 30
Publisher page

Abstract

Arrays of oriented, crystalline Si wires are transferred into flexible, transparent polymer films. The polymer-supported Si wire arrays in liquid-junction photoelectrochemical cells yield current-potential behavior similar to the Si wires attached to the brittle growth substrate. These systems offer the potential for attaining high solar energy-conversion efficiencies using modest diffusion length, readily grown, crystalline Si in a flexible, processable form.
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Research context

OpenAlex topics: Nanowire Synthesis and Applications · Silicon Nanostructures and Photoluminescence · Semiconductor materials and interfaces

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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25. Efficiency η= (Jsc)(Voc)(FF)/P whereP= 100 mW cm−2andJscis assumed to be 35 mA cm−2. From Table 1 for a polymer‐supported wire array at 60 mW cm−2(approximately the same above‐bandgap photon flux as 100 mW cm−2AM 1.5) the uncorrected FF = 0.35. BecauseVoc= (kT/q)ln(Jsc/Jo) increasingJscfrom 7.9 to 35 mA cm−2would increase theVocby 38 mV toVoc= 428 mV. The result isη= 5.2%.