Table 3. Hole Mobilities^a and Conductivities^b Obtained for Y1, Y2, Y3, and Spiro-OMeTAD.

HTMs	hole mobility (cm2 V–1 s–1)	conductivity (S cm–1)
Y1	1.99 × 10–5	4.06 × 10–7
Y2	2.04 × 10–5	3.66 × 10–7
Y3	1.88 × 10–5	4.05 × 10–7
Spiro-OMeTAD	1.69 × 10–4	2.17 × 10–5

^aHole mobilities were estimated without doping.

^bConductivities were determined with the same amount doping as for the solar cells.