Device physics of nanocrystalline silicon solar cells

Dalal, Vikram L.; Madhavan, Atul; Saripalli, S.; Chakravarty, Ν.; Noack, Max

doi:10.1109/pvsc.2009.5411412

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Subgap Quantum Efficiency1

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Cited by 3 publications

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“…The next task is to connect the subgap absorption with the subgap QE; we can get a simplified expression by assuming that recombination is low and diffusion length is high, which is a very realistic assumption for perovskites as explained in chapter 2.6 and in fact, we can also assume that the diffusion length is larger than the absorber thickness so that all the generated EHPs are collected in which case 𝑄𝐸 is given by [41]:…”

Section: Subgap Quantum Efficiencymentioning

confidence: 99%

Cesium based all inorganic perovskite solar cells

Sharikadze

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Section: Subgap Quantum Efficiencymentioning

confidence: 99%

Cesium based all inorganic perovskite solar cells

Sharikadze

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Lateral electrical transport and photocurrent in single and multilayers of two-dimensional arrays of Si nanocrystals

Manousiadis

Gardelis

Nassiopoulou

2012

Journal of Applied Physics

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We have investigated electrical transport and photocurrent in single and multilayers of two-dimensional arrays of silicon nanocrystals (SiNCs) suitable for photovoltaic applications. The films were grown on quartz by low pressure chemical vapor deposition of Si and subsequent thermal oxidation steps. We found that at high voltages, electrical transport is governed by space charge limited currents due to the presence of traps. At low voltages, electrical transport is ohmic. Carrier mobility, carrier concentration, and trap density in the films were extracted from the electrical measurements. Combining photocurrent and absorption measurements for the films with different SiNC sizes, we found a remarkable similarity in the photon energy dependence of the photocurrent and of the absorbed light from the SiNCs, confirming a proportionality relation between the two quantities. Also, from the combined study of electrical transport and photocurrent, minority carrier lifetimes were extracted.

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