Dear  Mahajan Sagar Bhaskar Ranjana 

the question is too generic to be answered properly.

What is the application you talk about?

Mobile phone chargers

Dear sir,

My question is about boost converter for Solar power 1kW application.

Regarding to a high gain DC-DC converter for 1KW PV system, I published two papers for one topology called switched inductor multilevel DC-DC converter which really gives high boosting ratio. You can check them in these links,

http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5697692

http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6099811

Thanks