se <span  title="" class="an ">&ensp;</span>a <span  title="" class="an ">&ensp;</span>voltage <span  title="" class="an ">&ensp;</span>dependent <span  title="" class="an ">&ensp;</span>increase <span  title="" class="an ">&ensp;</span>in <span  title="" class="an ">&ensp;</span>Po <span  title="" class="an ">&ensp;</span>and <span  title="" class="an ">&ensp;</span>slight <span  title="" class="an ">&ensp;</span>inward <span  title="" class="an ">&ensp;</span>rectification <span  title="" class="an ">&ens