Conversion Problem when downloading to excel by using cl_abap_conv_out_ce in BSP

Hi All,

We are download some date to excel by using the class

   CALL METHOD cl_abap_conv_out_ce=>create
            EXPORTING
              encoding = 'UTF-8'
            RECEIVING
              conv     = lo_utf8.

            CALL METHOD lo_utf8->write
            EXPORTING
              data = lv_string.

Every thing is fine but for some special character its not displaying properly. please find the below example

text = Chief Operating Officer – CIS

after down load to excel the special character is changed as mentioned below.

Chief Operating Officer – CIS

Is any way is there to solve this problem Thanks in advance.