Cross-References

Capture links internal to the article in a <xref> element.

Each <xref> element must have an @rid attribute which matches the @id attribute of the element being linked to. It must also contain a @ref-type attribute with the value determined by the type of element being linked to according to the table below:
Table 1. Ref-type values
Target Element Name Target Element @ref-type Value
Bibliographic Reference <ref> bibr
Footnote <fn> fn
Affiliation <aff> aff
Correspondence Note <corresp> corresp
Figure <fig> fig
Table <table-wrap> table
Section <sec> sec
Display Formula <disp-formula> disp-formula
Boxed Text <boxed-text> boxed-text
Statement <statement> statement
Appendix <app> app

Example

<p> Halide perovskite solar cells (PSCs) were introduced in 2009, with demonstrated
efficiencies just below 4% [ <xref ref-type="bibr" rid="jpenergyacc892bib1">1</xref> ].
Since then, PSC efficiencies have grown rapidly, reaching over 25% for single junction
cells [ <xref ref-type="bibr" rid="jpenergyacc892bib2">2</xref> ], and over 30% for
tandem perovskite-on-silicon devices [ <xref ref-type="bibr" rid="jpenergyacc892bib3">3</xref> , <xref ref-type="bibr" rid="jpenergyacc892bib4">4</xref> ]. Scalability
potential towards PSC modules has been demonstrated, with pilot outdoor small scale
photovoltaic (PV) systems already being made [ <xref ref-type="bibr" rid="jpenergyacc892bib5">5</xref> , <xref ref-type="bibr" rid="jpenergyacc892bib6">6</xref> ]. Past experience based on organic PV device stability testing protocols
has accelerated the understanding of degradation and stability towards more stable PSC
devices [ <xref ref-type="bibr" rid="jpenergyacc892bib7">7</xref> , <xref ref-type="bibr" rid="jpenergyacc892bib8">8</xref> ]. </p>