Substitutes

Substitutes and Alternatives for Tellurium

The availability of viable substitutes is a key factor in assessing Tellurium's criticality. Across its 3 primary applications, substitution options range from commercially viable alternatives with performance trade-offs to applications where Tellurium currently has no effective substitute.

Substitution Analysis by Application

The following table details available substitutes for Tellurium across its primary applications, including the trade-offs involved:

Performance Trade-offs

In most applications, substituting Tellurium involves measurable performance penalties. CdTe is the only commercially successful thin-film PV technology (First Solar); lower manufacturing cost than silicon in some conditions but lower efficiency (~22% vs ~24% for silicon); tellurium scarcity is the primary scaling constraint. In high-performance applications such as cadmium telluride solar cells, these trade-offs can be particularly significant.

Research and Development

Active research programs are underway to develop improved substitutes and to reduce the amount of Tellurium required per unit of product (thrifting). However, timelines for commercializing new alternatives typically span years to decades. The limited substitutability of Tellurium is a primary driver of its high criticality rating, prompting government-funded substitution research programs.