Convenient contrast enhancement by a hole-free phase plate

► We present results a hole-free phase plate (HFPP) method for phase imaging in TEM. ► The HFPP offers up to 3× decrease in irradiation dose compared to bright field TEM. ► The incident beam itself defines the HFPP center, mechanical alignment is not needed. ► Film bias due to secondary electron emission is the likely origin of HFPP contrast.