convert csv file to excel using powershell

I'm trying to convert a csv file to excel using powershell. I got some help from another post and the script runs, but the output is a blank xlsx file.

Can someone help please?

Here is the powershell script

param (
[Parameter(Mandatory=$true)][string]$inputfile,
[Parameter(Mandatory=$true)][string]$outputfile
)

$excel = New-Object -ComObject Excel.Application
$excel.Visible = $false

$wb = $excel.Workbooks.Add()
$ws = $wb.Sheets.Item(1)

$ws.Cells.NumberFormat = "@"

write-output "Opening $inputfile"

$i = 1
Import-Csv $inputfile | Foreach-Object { 
$j = 1
foreach ($prop in $_.PSObject.Properties)
{
    if ($i -eq 1) {
        $ws.Cells.Item($i, $j) = $prop.Name
    } else {
        $ws.Cells.Item($i, $j) = $prop.Value
    }
    $j++
}
$i++
}

$wb.SaveAs($outputfile,51)
$wb.Close()
$excel.Quit()
write-output "Success"

Then I'm running the following command

.\csv_to_excel.ps1 -inputfile "C:\Scripts\testcsv.csv" -outputfile "C:\Scripts\data.xlsx"

Also, if anyone has experience with the Import Excel powershell module and has some kind of guide for that, I would appreciate that as well.

Thanks