Output management in pdepe

Using PDEPE, I calculating the diffusion and particle reaction. Time span for pdepe is 0 : 1e-12 : 1e-0

m = 0; x = 0:2e-6:200e-6; t = 0:1e-12:1e-0; sol = pdepe(m,@pdex4pde,@pdex4ic,@pdex4bc,x,t);

However, too many time span causes too large data and difficult to deal with. How to make the sol with log scale time (ex, 1e-12, 1e-11, 1e-10 and so on). I mean direct save, no extract the data from the large "sol"