A Baolisheng Photovoltaic Bracket Xiao Li

What is the photovoltage response of BTO?

Using the large-radius (5 μm) probe and 405-nm illumination, the response in BTO (Fig. 2b, blue) shows a photovoltage Voc (≈−8 V) that far exceeds the bandgap of BTO, with Isc ≈ 0.2 nA.

What is anomalous photovoltaic effect (bpve)?

Also known as the anomalous photovoltaic effect, the BPVE can be observed in crystals that belong to 20 point groups that lack a centre of inversion symmetry (including ferro- and piezoelectrics). There are two proposed mechanisms of BPVE: ballistic and shift.

Do rubidium cations improve photovoltaic performance of perovskite solar cells?

Nat. Energy 3, 61–67 (2018). Saliba, M. et al. Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance. Science 354, 206–209 (2016). Zhang, H. et al. Photovoltaic behaviour of lead methylammonium triiodide perovskite solar cells down to 80 K. J. Mater. Chem. A 3, 11762–11767 (2015).

Are photogenerated bpve electrons ballistic?

We confirmed the ballistic character of the photogenerated BPVE electrons in BTO by measuring the Hall component of the bulk photovoltaic current under illumination at 300 K in a BTO single crystal, obtaining the mobility of the non-thermalized electrons of ≈2,000 ± 200 cm 2 V –1 s –1 (see Methods).

Why is EQE high in monodomain BTO compared to bifeo 3?

In monodomain BTO, the very high ηEQE value from excitation by arises from several sources: the excitation of oxygen vacancy-bound donor electrons can yield hot carriers with kinetic energies of nearly 2 Eg (≈6.0 eV) in addition to interband excitation, and the several times higher value of g31 in BTO compared with BiFeO 3.