Number of published papers on several relevant topics. The number in parentheses shows the most relevant original research articles on the topic, determined by hand count.

Topic	Number of papers publisheda
DSC/OPV	70 000+
MHP solar cells	14 850
BIPV	1686
Photochromic DSCs/OPV	30 (16)
Color switchable MHP	28 (18)
Liquid crystal LSC	17

^aDetermined 5/22-6/2, 2023 using Web of Science keyword search.