1 EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-3 (No. 333-47560) of AXT, Inc. of our report dated February 9, 2001 relating to the consolidated financial statements, which appears in this Form 10-K. PricewaterhouseCoopers LLP San Jose, California February 26, 2001