Any PhD application should basically have a covering letter, CV and research proposal(if required) and your other educational documents. A CV should detail your educational qualifications, your awards and honors, your research publications (preferably include peer reviewed journal publications only if you have too many) also include your experiences (work/research), references. In your covering letter state your past experiences and also your interests, lay strong importance how you can contribute to the field of study.
All the best!
All the best!